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Subliminal stimuli

January 08, 2023

Subliminal stimuli (/sʌbˈlɪmɪnəl/; the prefix sub- literally means "below" or "less than")[1] are any sensory stimuli below an individual's threshold for conscious perception, in contrast to supraliminal stimuli (above threshold).[2] A 2012 review of functional magnetic resonance imaging (fMRI) studies showed that subliminal stimuli activate specific regions of the brain despite participants' unawareness.[3] Visual stimuli may be quickly flashed before an individual can process them, or flashed and then masked to interrupt processing. Audio stimuli may be played below audible volumes or masked by other stimuli.

Effectiveness

Applications of subliminal stimuli are often based on the persuasiveness of a message. Research on action priming has shown that subliminal stimuli can only trigger actions a receiver of the message plans to perform anyway. However, consensus of subliminal messaging remains unsubstantiated by other research. Most actions can be triggered subliminally only if the person is already prepared to perform a specific action.[4]

The context that the stimulus is presented in affects their effectiveness.[5] For example, if the target is thirsty then a subliminal stimulus for a drink is likely to influence the target to purchase that drink if it is readily available.[5] The stimuli can also influence the target to choose the primed option over other habitually chosen options.[5] If the subliminal stimuli are for a product that is not quickly accessible or if there is no need for it within a specific context then the stimuli will have little to no effect.[5] Subliminal priming can direct people's actions even when they believe they are making free choices.[4] When primed to push a button with their off-hand, people will use that hand even if they are given a free choice between using their off-hand and their dominant hand.[4] However, a meta analysis of many strong articles displaying effectiveness of subliminal messaging revealed its effects on actual consumer purchasing choices between two alternatives are not statistically significant;[6] subliminal messaging is only effective in behaviour in very specific present intentions and contexts, which means they do not have visible results for mischievous results. It is suggested, however, that subliminal stimuli can bias acting decisions, including internally and freely generated ones, but, since that effect remains alongside with the aforementioned intentions and contexts, any impact on the choice of action are not mischievous but rather appropriate and adaptive.[4][5][6]

Method

In subliminal stimuli research, the threshold is the level at which the participant is not aware of the stimulus being presented.[7] Researchers determine a threshold for the stimulus that is used as the subliminal stimulus. That stimulus is then presented during the study at some point and measures are taken to determine the effects of the stimulus. The way in which studies operationally define thresholds depends on the methods of the particular article. The methodology of the research also varies by the type of subliminal stimulus (auditory or visual) and the dependent variables they measure.

Objective threshold

The objective threshold is found using a forced-choice procedure, in which participants must choose which stimulus they saw from options given to them.[7] For example, participants are flashed a stimulus (like the word orange) and then given a few choices and asked which one they saw. Participants must choose an answer in this design. The objective threshold is obtained when participants are at the chance level of performance[definition needed] in this task.[7] The length of presentation that causes chance performance on the forced-choice task is used later in the study for the subliminal stimuli.

Subjective threshold

The subjective threshold is determined when the participant reports that their performance on the forced-choice procedure approximates chance. The subjective threshold is 30 to 50 ms slower than the objective threshold, demonstrating that participants' ability to detect the stimuli is earlier than their perceived accuracy ratings would indicate; that is, stimuli presented at a subjective threshold have a longer presentation time than those presented at an objective threshold. When using the objective threshold, priming stimuli neither facilitated nor inhibited the recognition of a color. However, the longer the duration of the priming stimulus, the greater effect it had on subsequent responding. These findings indicate that the results of some studies may be due to their definition of below threshold.[7]

Direct and indirect measures

Perception without awareness can be demonstrated through the comparison of direct and indirect measures of perception.[8] Direct measures use responses to task definitions in accordance to the explicit instructions given to the subjects, while indirect measures use responses that are not a part of the task definition given to subjects.[8] Both direct and indirect measures are displayed under comparable conditions except for the direct or indirect instruction. For example, in a typical Stroop test, subjects are asked to name the color of a patch of ink. A direct measure is accuracy—true to the instructions given to the participants. The popular indirect measure used in the same task is response time—subjects are not told that they are being measured for response times.

Similarly, a direct effect is the effect of a task stimulus on the instructed response to it, and is usually measured as accuracy. An indirect effect is an uninstructed effect of the task stimulus on behavior, sometimes measured by including an irrelevant or distracting component in the task stimulus and measuring its effect on accuracy.[9] These effects are then compared on their relative sensitivity: an indirect effect that is greater than a direct effect indicates that unconscious cognition exists.[8][9]

Visual stimuli

In order to study the effects of subliminal stimuli, researchers often prime participants with specific visual stimuli, and determine if those stimuli elicit different responses.[10][11] Subliminal stimuli have mostly been studied in the context of emotion; in particular, researchers have focused a lot of attention to the face perception and how subliminal presentation to different facial expression affects emotion.[12][13][14][15] Visual subliminal stimuli have also been used to study emotion eliciting stimuli and simple geometric stimuli.[16][17][18][19] A significant amount of research has been produced throughout the years to demonstrate the effects of subliminal visual stimuli.[20]

Images

Attitudes can develop without being aware of their antecedents[definition needed].[10] Individuals viewed slides of people performing familiar daily activities after being exposed to either an emotionally positive scene, such as a romantic couple or kittens, or an emotionally negative scene, such as a werewolf or a dead body between each slide and the next. After exposure from something which the individuals consciously perceived as a flash of light, the participants exhibited more positive personality traits to those people whose slides were associated with an emotionally positive scene and vice versa. Despite the statistical difference, the subliminal messages had less of an impact on judgment than the slide's inherent level of physical attractiveness.[10][21]

Individuals show right amygdala activity in response to subliminal fear, and a greater left amygdala response to supraliminal fear.[11] In a 2005 study, participants were exposed to a subliminal image flashed for 16.7 milliseconds that could signal a potential threat and again with a supraliminal image flashed for half a second. Furthermore, supraliminal fear showed more sustained cortical activity, suggesting that subliminal fear may not entail conscious surveillance while supraliminal fear entails higher-order processing.[11]

Emotion eliciting stimuli

A subliminal sexual stimulus has a different effect on men compared to women. In a study by Omri Gilliath et al., men and women were subliminally exposed to either a sexual or a neutral picture, and their sexual arousal was recorded. Researchers examined the accessibility of sex-related thoughts after following the same procedure with either a pictorial judgment task or lexical decision task. The results revealed that the subliminal sexual stimuli did not have an effect on men, but for women, lower levels of sexual arousal were reported. However, in conditions related to accessibility of sex-related thoughts, the subliminal sexual stimuli led to higher accessibility for both men and women.[16]

Subliminal stimuli can elicit significant emotional changes, but these changes are not valuable for a therapeutic effect.[17] Spider-fearful and non-fearful undergraduates experienced either a positive, negative, or neutral subliminal priming stimulus followed immediately by a picture of a spider or a snake. Using visual analogue scales, the participants rated the affective quality of the picture. No evidence was found to support that the unpleasantness of the pictures can be modulated by subliminal priming.[17] Non-fearful participants rated the spiders as being more frightening after being primed with a negative stimulus, but the event was not found in fearful participants.[17]

Simple geometric stimuli

Laboratory research on unconscious perception often employs simple stimuli (e.g., geometric shapes or colors) in which visibility is controlled by visual masking.[18] Masked stimuli are then used to prime the processing of subsequently presented target stimuli. For instance, in the response priming paradigm, participants have to respond to a target stimulus (e.g. by identifying whether it is a diamond or a square) which is immediately preceded by a masked priming stimulus (also a diamond or a square). The prime has large effects on responses to the target: it speeds responses when it is consistent with the target, and slows responses when it is inconsistent. Response priming effects can be dissociated from visual awareness of the prime, such as when prime identification performance is at chance, or when priming effects increase despite decreases in prime visibility.[18]

The presentation of geometric figures as subliminal stimuli can result in below threshold discriminations.[19] The geometric figures were presented on slides of a tachistoscope followed by a supraliminal shock for a given slide every time it appeared. The shock was administered after a five-second interval. Electrical skin changes of the participants that occurred before the reinforcement (shock) or non-reinforcement were recorded. The findings indicate that the proportion of electrical skin changes that occurred following subliminal visual stimuli was significantly greater than expected, while the proportion of electrical skin changes that occurred in response to the stimuli which were not reinforced was significantly less. As a whole, participants were able to make below threshold discriminations.[19]

Word and non-word stimuli

Another form of visual stimuli is words and non-words. In a set of experiments, words and non-words were used as subliminal primes. Priming stimuli that work best as subliminal stimuli are words that have been classified several times before they are used to prime. Word primes can also be made from parts of practiced words to create new words. In this case, the actual word used to prime can have the opposite meaning of the words it came from (its "parents"), but it will still prime for the meaning of the parent words. Non-words created from previously practiced stimuli have a similar effect, even when they are unpronounceable (e.g. made of all consonants). These primes generally only increase response times for later stimuli for a very short period of time (milliseconds).[22]

Masking visual stimuli

Visual stimuli are often masked by forward and backward masks so that they can be displayed for longer periods of time without the subject being able to recognize the priming stimuli. A forward mask is briefly displayed before the priming stimulus and a backward mask usually follows it to prevent the subject from recognizing the stimulus.[23]

Auditory stimuli

Auditory masking

One method for creating subliminal auditory stimuli is masking, which involves hiding the target auditory stimulus in some way. Auditory subliminal stimuli are shown to have some effect on the participant, but not a large one.[23] For example, one study used other speechlike sounds to cover up the target words, and it found evidence of priming in the absence of awareness of the stimuli. The effects of these subliminal stimuli were only seen in one of the outcome measures of priming, while the effects of conscious stimuli were seen in multiple outcome measures.[23] However, the empirical evidence for the assumption of an impact of auditory subliminal stimuli on human behavior remains weak; in an experimental study on the influence of subliminal target words (embedded into a music track) on choice behavior for a drink,[24] authors found no evidence for a manipulative effect.

Self-help audio recordings

A study investigated the effects on self-concept of rational emotive behavior therapy and auditory subliminal stimulation (separately and in combination) on 141 undergraduate students with self-concept problems. They were randomly assigned to one of four groups receiving either rational-emotive therapy, subliminal stimulation, both, or a placebo treatment. Rational-emotive therapy significantly improved scores on all dependent measures (cognition, self-concept, self-esteem, anxiety) except behavior. Results for the subliminal stimulation group were similar to those of the placebo treatment except for a significant self-concept improvement and a decline in self-concept-related irrational cognitions. The combined treatment yielded results similar to those of rational-emotive therapy, with tentative indications of continued improvement in irrational cognitions and self-concept from posttest to follow-up.[25]

Studies on advertising with subliminal stimuli in still images

Among the researchers in favor of subliminal stimuli is Wilson Bryan Key.[26] One of Key's most cited studies is a whisky ad in which he found several hidden figures in ice cubes.[27] However, Cecil Adams wrote that Key is someone with a sexual fixation.[28]

Luís Bassat suggests an interesting observation by indicating that the current objective of advertising is "to get the consumer to take into account the brand when making the decision",[29] a trend opposed to the objective of subliminal advertising. In turn, Fernando Ocaña showed that the essential thing in the field of media planning is to obtain the greatest possible memory, which implies a conscious perception and not an unconscious one as it should be the case.

Consumption, television and criticism

Some studies looked at the efficacy of subliminal messaging in television. Subliminal messages produce only one-tenth of the effects of detected messages and the findings related to the effects of subliminal messaging were relatively ambiguous.[30] Participants’ ratings of positive responses to commercials were not affected by subliminal messages in the commercials.[30]

Johan Karremans suggests that subliminal messages have an effect when the messages are goal-relevant.[31] In a study, researchers made half of the 105 volunteers feel thirsty by giving them food with lots of salt before performing the experiment. At the end, as predicted, they found that the subliminal message had succeeded among the thirsty. 80% of them chose a certain ice tea brand versus the 20% of the control group that were not exposed to the message. Those who were not thirsty did not choose the drink in question, despite the subliminal message. The experiment showed that in certain circumstances subliminal advertising worked.[32][31]

Karremans did a study assessing whether subliminal priming of a brand name of a drink would affect a person's choice of drink, and if this effect was caused by the individual's feelings of being thirsty.[31] In another study, participant's ratings of thirst were higher after viewing an episode of The Simpsons that contained single frames of the word thirsty or of a picture of a Coca-Cola can.[33] Some studies showed greater effects of subliminal messaging with as high as 80% of participants showing a preference for a particular rum when subliminally primed by the name placed in an ad backward.[34] Martin Gardner, however, criticizes claims, such as those by Wilson Bryan Key, by pointing out that "recent studies" serving as the basis for his claims were not identified by place or experimenter. He also suggests that claims about subliminal images are due to the "tendency of chaotic shapes to form patterns vaguely resembling familiar things".[35] In 2009, the American Psychological Association defended that subliminal stimuli are subordinated to previously structured associative stimuli and that their only role is to reinforce a certain behavior or a certain previous attitude, without there being conclusive evidence that the stimulus that provokes these behaviors is properly subliminal.[36]

Currently, there is still speculation about this effect. Many authors have continued to argue for the effectiveness of subliminal cues in changing consumption behavior, citing environmental cues as a main culprit of behavior change.[37] Authors who support this line of reasoning cite findings such as Ronald Millman's research that showed slow-paced music in a supermarket was associated with more sales and customers moving at a slower pace.[38] Findings such as these support the notion that external cues can affect behavior, although the stimulus may not fit into a strict definition of subliminal stimuli because although the music may not be attended to or consciously affecting the customers, they are certainly able to perceive it.

Subliminal messaging is prohibited in advertising in the United Kingdom.[39]

See also

References

  1. ^ Lewis, Charlton T.; Short, Charles. "sublīmis". A Latin Dictionary – via Perseus Project.
  2. ^ Loftus, Elizabeth F.; Klinger, Mark R. (June 1992). "Is the unconscious smart or dumb?". American Psychologist. 47 (6): 761–65. doi:10.1037/0003-066X.47.6.761. PMID 1616173.
  3. ^ Brooks, S. J.; Savov V.; Allzén E.; Benedict C.; Fredriksson R.; Schiöth H. B. (February 2012). "Exposure to subliminal arousing stimuli induces robust activation in the amygdala, hippocampus, anterior cingulate, insular cortex and primary visual cortex: a systematic meta-analysis of fMRI studies". NeuroImage. 59 (3): 2962–2973. doi:10.1016/j.neuroimage.2011.09.077. PMID 22001789.
  4. ^ a b c d Schlaghecken, F.; Eimer, M. (2004). "Subliminal stimuli can bias 'free' choices between response alternatives". Psychonomic Bulletin & Review. 11 (3): 463–468. doi:10.3758/bf03196596. PMID 15376796.
  5. ^ a b c d e Verwijmeren, Thijs; Karremans, Johan C.; Stroebe, Wolfgang; Wigboldus, Daniël H.J. (April 2011). "The workings and limits of subliminal advertising: The role of habits". Journal of Consumer Psychology. 21 (2): 206–213. doi:10.1016/j.jcps.2010.11.004. ISSN 1057-7408.
  6. ^ a b Trappey, R. (2014). Brand choice : revealing customers' unconscious -automatic and strategic thinking processes. Palgrave Macmillan. ISBN 978-1-349-52357-3. OCLC 945231870.
  7. ^ a b c d Chessman, Jim; Merikle, Philip M. (1984). "Priming with and without awareness". Perception and Psychophysics. 36 (4): 387–395. doi:10.3758/bf03202793. PMID 6522236.
  8. ^ a b c Reingold, Eyal M.; Merikle, Philip M. (1988). "Direct and indirect measures to study perceptions without awareness". Perception and Psychophysics. 44 (6): 563–575. doi:10.3758/bf03207490. PMID 3200674.
  9. ^ a b Greenwald, Anthony G.; Klinger, Mark R.; Schuh, Eric S. (1995). "Activation by marginally Perceptible ("Subliminal") Stimuli: Dissociation of Unconscious From Conscious Cognition". Journal of Experimental Psychology. 124 (1): 22–42. doi:10.1037/0096-3445.124.1.22. PMID 7897340.
  10. ^ a b c Krosnick, J. A.; Betz, A. L.; Jussim, L. J.; Lynn, A. R. (1992). "Subliminal Conditioning of Attitudes". Personality and Social Psychology Bulletin. 18 (2): 152–162. doi:10.1177/0146167292182006. S2CID 145504287.
  11. ^ a b c Williams, L. M.; Liddell, B. J.; Kemp, A. H.; Bryant, R. A.; Meares, R. A.; Peduto, A. S.; Gordon, E. (2006). "Amygdala–prefrontal dissociation of subliminal and supraliminal fear". Human Brain Mapping. 27 (8): 652–661. doi:10.1002/hbm.20208. PMC 6871444. PMID 16281289.
  12. ^ Baldwin, M.; Carrell, D. F.; Lopez, D. F. (1990). "Priming relationship schemas: My advisor and the pope are watching me from the back of my mind" (PDF). Journal of Experimental Social Psychology. 26 (5): 435–454. CiteSeerX 10.1.1.321.544. doi:10.1016/0022-1031(90)90068-W.
  13. ^ Lee, Su Young; Kang, Jee In; Lee, Eun; Namkoong, Kee; An, Suk Kyoon (February 2011). "Differential priming effect for subliminal fear and disgust facial expressions". Attention, Perception, & Psychophysics. 2. 73 (2): 473–481. doi:10.3758/s13414-010-0032-3. PMID 21264732.
  14. ^ Ibáñez, Agustin; Hurtado, Esteban; Lobos, Alejandro; Escobar, Josefina; Trujillo, Natalia; Baez, Sandra; Huepe, David; Manes, Facundo; Decety, Jean (29 June 2011). "Subliminal presentation of other faces (but not own face) primes behavioral and evoked cortical processing of empathy for pain". Brain Research. 1398: 72–85. doi:10.1016/j.brainres.2011.05.014. PMID 21624566. S2CID 20717144.
  15. ^ Yang, Zixu; Tong, Eddie M. W. (2010). "The Effects of Subliminal Anger and Sadness Primes on Agency Appraisals". Emotion. 10 (6): 915–922. doi:10.1037/a0020306. PMID 21058845.
  16. ^ a b Gillath, Omri; Mikulincer, Mario; Birnbaum, Gurit E.; Shaver, Phillip R. (May 2007). "Does subliminal exposure to sexual stimuli have the same effects on men women?" (PDF). Journal of Sex Research. 2. 44 (2): 111–121. CiteSeerX 10.1.1.581.7310. doi:10.1080/00224490701263579. PMID 17599269. S2CID 38357734.
  17. ^ a b c d Mayer, Birgit; Merckelbach, Harald (10 December 1998). "Do subliminal priming effects on emotion have clinical potential?". Anxiety, Stress, & Coping. 12 (2): 217–229. doi:10.1080/10615809908248330.
  18. ^ a b c Vorberg, D.; Mattler, U.; Heinecke, A.; Schmidt, T.; Schwarzbach, J. (2003). "Different time courses for visual perception and action priming". Proceedings of the National Academy of Sciences USA. 100 (10): 6275–6280. Bibcode:2003PNAS..100.6275V. doi:10.1073/pnas.0931489100. PMC 156362. PMID 12719543.
  19. ^ a b c Taylor, Frank W. R. (March 1953). "The discrimination of subliminal visual stimuli". Canadian Journal of Experimental Psychology. 1. 7 (1): 12–20. doi:10.1037/h0083570. PMID 13032835.
  20. ^ Kouider, S; Dehaene, S (May 2007). "Levels of processing during non-conscious perception: a critical review of visual masking". Philos Trans R Soc Lond B Biol Sci. 362 (1481): 857–75. doi:10.1098/rstb.2007.2093. PMC 2430002. PMID 17403642.
  21. ^ www.monyms.ir
  22. ^ Abrams, R. L.; Greenwald, A. G. (2000). "Parts outweigh the whole (word) in unconscious analysis of meaning". Psychological Science. 11 (2): 118–124. CiteSeerX 10.1.1.79.8405. doi:10.1111/1467-9280.00226. PMID 11273418. S2CID 6563451.
  23. ^ a b c Breitmeyer, B.G.; Ogmen, H. (2007). "Visual Masking". Scholarpedia. 2 (7): 3330. Bibcode:2007SchpJ...2.3330B. doi:10.4249/scholarpedia.3330.
  24. ^ Egermann, Hauke; Kopiez, Reinhard; Reuter, Christoph (2007). "Is there an effect of subliminal messages in music on choice behavior?". Journal of Articles in Support of the Null Hypothesis. 4 (2): 29–64.
  25. ^ Comparison of the effects of auditory subliminal stimulation and rational-emotive therapy, separately and combined, on self-concept. Möller AT, Kotzé HF, Sieberhagen KJ. Department of Psychology, University of Stellenbosch, RSA.
  26. ^ Chen, Adam. Expert discusses the effects of subliminal advertising
  27. ^ Johns, Craig M. . University of Iowa. Archived from the original on 2007-01-08.
  28. ^ Adams, Cecil (26 June 1987). "Are subliminal messages secretly embedded in advertisements?". straightdope.com.
  29. ^ Bassat, Luís, Libro rojo de la publicidad, Editorial Planeta, Barcelona, 2003
  30. ^ a b Smith, Kirk H.; Rogers, Martha (1994). "Effectiveness of subliminal messages in television commercials: Two experiments". Journal of Applied Psychology. 79 (6): 866–874. doi:10.1037/0021-9010.79.6.866.
  31. ^ a b c Karremans, Johan C.; Stroebe, Wolfgang; Claus, Jasper (2006-11-01). "Beyond Vicary's fantasies: The impact of subliminal priming and brand choice". Journal of Experimental Social Psychology. 42 (6): 792–798. doi:10.1016/j.jesp.2005.12.002. ISSN 0022-1031.
  32. ^ Motluk, Alison. "Subliminal advertising may work after all". New Scientist. Retrieved 2020-11-02.
  33. ^ Cooper, Joel; Cooper, Grant (2002). "Subliminal motivation: A story revisited". Journal of Applied Social Psychology. 32 (11): 2213–2227. doi:10.1111/j.1559-1816.2002.tb01860.x.
  34. ^ Key, W.B. (1973), Subliminal seduction: Ad media's manipulation of a not so innocent America, Englewood Cliffs, NJ: Prentice-Hall, ISBN 978-0-13-859090-1
  35. ^ Radford, Benjamin (September–October 2019). "Subliminal Advertising, Trumpian and Otherwise". Skeptical Inquirer. Vol. 43, no. 5. Center for Inquiry. pp. 28–29.
  36. ^ "Los mensajes subliminales sí funcionan". BBC Mundo. Londres: BBC. 28 September 2009. Retrieved 3 July 2016.
  37. ^ Dijksterhuis, Ap; Smith, Pamela K.; van Baaren, Rick B.; Wigboldus, Daniel H.J. (2005). "The unconscious consumer: Effects of environment on consumer behavior". Journal of Consumer Psychology. 15 (3): 193–202. CiteSeerX 10.1.1.167.6867. doi:10.1207/s15327663jcp1503_3.
  38. ^ Milliman, Ronald E. (1982). "Using Background Music to Affect the Behavior of Supermarket Shoppers". Journal of Marketing. 46 (3): 86–91. doi:10.2307/1251706. JSTOR 1251706.
  39. ^ "Section 3. Misleading-advertising". BCAP Code. Committees on Advertising Practice (CAP). 2013. Retrieved 6 January 2014. "No advertisement may use images of very brief duration, or any other technique that is likely to influence consumers, without their being fully aware of what has been done."

Further reading

  • Boese, Alex (2006), Hippo Eats Dwarf: A Field Guide to Hoaxes and Other B.S, Orlando: Harcourt, pp. 193–195, ISBN 978-0-15-603083-0
  • Dixon, Norman F. (1971), Subliminal Perception: The nature of a controversy, New York: McGraw-Hill, ISBN 978-0-07-094147-2
  • Greenwald, A. G. (1992). "New Look 3: Unconscious cognition reclaimed" (PDF). American Psychologist. 47 (6): 766–779. doi:10.1037/0003-066X.47.6.766. PMID 1616174.
  • Holender, D. (1986), "Semantic activation without conscious identification in dichotic listening, parafoveal vision, and visual masking: A survey and appraisal" (PDF), Behavioral and Brain Sciences, 9 (1): 1–23, doi:10.1017/s0140525x00021269, S2CID 145629913
  • Merikle, P. M.; Daneman, M. (1998), "Psychological Investigations of Unconscious Perception", Journal of Consciousness Studies, 5 (1): 5–18
  • United States Senate, Ninety-ninth Congress, First Session on Contents of Music and the Lyrics of Records (September 19, 1985), Record Labeling: Hearing before the Committee on Commerce, Science, and Transportation, Washington, DC: U.S. Government Printing Office{{citation}}: CS1 maint: multiple names: authors list (link)
  • Watanabe, T.; Náñez, J.; Sasaki, Y. (2001). "Perceptual learning without perception". Nature. 413 (6858): 844–848. Bibcode:2001Natur.413..844W. doi:10.1038/35101601. PMID 11677607. S2CID 4381577.

January 08, 2023
subliminal, stimuli, prefix, literally, means, below, less, than, sensory, stimuli, below, individual, threshold, conscious, perception, contrast, supraliminal, stimuli, above, threshold, 2012, review, functional, magnetic, resonance, imaging, fmri, studies, s. Subliminal stimuli s ʌ b ˈ l ɪ m ɪ n el the prefix sub literally means below or less than 1 are any sensory stimuli below an individual s threshold for conscious perception in contrast to supraliminal stimuli above threshold 2 A 2012 review of functional magnetic resonance imaging fMRI studies showed that subliminal stimuli activate specific regions of the brain despite participants unawareness 3 Visual stimuli may be quickly flashed before an individual can process them or flashed and then masked to interrupt processing Audio stimuli may be played below audible volumes or masked by other stimuli Contents 1 Effectiveness 2 Method 2 1 Objective threshold 2 2 Subjective threshold 2 3 Direct and indirect measures 3 Visual stimuli 3 1 Images 3 2 Emotion eliciting stimuli 3 3 Simple geometric stimuli 3 4 Word and non word stimuli 3 5 Masking visual stimuli 4 Auditory stimuli 4 1 Auditory masking 4 2 Self help audio recordings 5 Studies on advertising with subliminal stimuli in still images 6 Consumption television and criticism 7 See also 8 References 9 Further readingEffectiveness EditApplications of subliminal stimuli are often based on the persuasiveness of a message Research on action priming has shown that subliminal stimuli can only trigger actions a receiver of the message plans to perform anyway However consensus of subliminal messaging remains unsubstantiated by other research Most actions can be triggered subliminally only if the person is already prepared to perform a specific action 4 The context that the stimulus is presented in affects their effectiveness 5 For example if the target is thirsty then a subliminal stimulus for a drink is likely to influence the target to purchase that drink if it is readily available 5 The stimuli can also influence the target to choose the primed option over other habitually chosen options 5 If the subliminal stimuli are for a product that is not quickly accessible or if there is no need for it within a specific context then the stimuli will have little to no effect 5 Subliminal priming can direct people s actions even when they believe they are making free choices 4 When primed to push a button with their off hand people will use that hand even if they are given a free choice between using their off hand and their dominant hand 4 However a meta analysis of many strong articles displaying effectiveness of subliminal messaging revealed its effects on actual consumer purchasing choices between two alternatives are not statistically significant 6 subliminal messaging is only effective in behaviour in very specific present intentions and contexts which means they do not have visible results for mischievous results It is suggested however that subliminal stimuli can bias acting decisions including internally and freely generated ones but since that effect remains alongside with the aforementioned intentions and contexts any impact on the choice of action are not mischievous but rather appropriate and adaptive 4 5 6 Method EditIn subliminal stimuli research the threshold is the level at which the participant is not aware of the stimulus being presented 7 Researchers determine a threshold for the stimulus that is used as the subliminal stimulus That stimulus is then presented during the study at some point and measures are taken to determine the effects of the stimulus The way in which studies operationally define thresholds depends on the methods of the particular article The methodology of the research also varies by the type of subliminal stimulus auditory or visual and the dependent variables they measure Objective threshold Edit The objective threshold is found using a forced choice procedure in which participants must choose which stimulus they saw from options given to them 7 For example participants are flashed a stimulus like the word orange and then given a few choices and asked which one they saw Participants must choose an answer in this design The objective threshold is obtained when participants are at the chance level of performance definition needed in this task 7 The length of presentation that causes chance performance on the forced choice task is used later in the study for the subliminal stimuli Subjective threshold Edit The subjective threshold is determined when the participant reports that their performance on the forced choice procedure approximates chance The subjective threshold is 30 to 50 ms slower than the objective threshold demonstrating that participants ability to detect the stimuli is earlier than their perceived accuracy ratings would indicate that is stimuli presented at a subjective threshold have a longer presentation time than those presented at an objective threshold When using the objective threshold priming stimuli neither facilitated nor inhibited the recognition of a color However the longer the duration of the priming stimulus the greater effect it had on subsequent responding These findings indicate that the results of some studies may be due to their definition of below threshold 7 Direct and indirect measures Edit Perception without awareness can be demonstrated through the comparison of direct and indirect measures of perception 8 Direct measures use responses to task definitions in accordance to the explicit instructions given to the subjects while indirect measures use responses that are not a part of the task definition given to subjects 8 Both direct and indirect measures are displayed under comparable conditions except for the direct or indirect instruction For example in a typical Stroop test subjects are asked to name the color of a patch of ink A direct measure is accuracy true to the instructions given to the participants The popular indirect measure used in the same task is response time subjects are not told that they are being measured for response times Similarly a direct effect is the effect of a task stimulus on the instructed response to it and is usually measured as accuracy An indirect effect is an uninstructed effect of the task stimulus on behavior sometimes measured by including an irrelevant or distracting component in the task stimulus and measuring its effect on accuracy 9 These effects are then compared on their relative sensitivity an indirect effect that is greater than a direct effect indicates that unconscious cognition exists 8 9 Visual stimuli EditIn order to study the effects of subliminal stimuli researchers often prime participants with specific visual stimuli and determine if those stimuli elicit different responses 10 11 Subliminal stimuli have mostly been studied in the context of emotion in particular researchers have focused a lot of attention to the face perception and how subliminal presentation to different facial expression affects emotion 12 13 14 15 Visual subliminal stimuli have also been used to study emotion eliciting stimuli and simple geometric stimuli 16 17 18 19 A significant amount of research has been produced throughout the years to demonstrate the effects of subliminal visual stimuli 20 Images Edit Attitudes can develop without being aware of their antecedents definition needed 10 Individuals viewed slides of people performing familiar daily activities after being exposed to either an emotionally positive scene such as a romantic couple or kittens or an emotionally negative scene such as a werewolf or a dead body between each slide and the next After exposure from something which the individuals consciously perceived as a flash of light the participants exhibited more positive personality traits to those people whose slides were associated with an emotionally positive scene and vice versa Despite the statistical difference the subliminal messages had less of an impact on judgment than the slide s inherent level of physical attractiveness 10 21 Individuals show right amygdala activity in response to subliminal fear and a greater left amygdala response to supraliminal fear 11 In a 2005 study participants were exposed to a subliminal image flashed for 16 7 milliseconds that could signal a potential threat and again with a supraliminal image flashed for half a second Furthermore supraliminal fear showed more sustained cortical activity suggesting that subliminal fear may not entail conscious surveillance while supraliminal fear entails higher order processing 11 Emotion eliciting stimuli Edit A subliminal sexual stimulus has a different effect on men compared to women In a study by Omri Gilliath et al men and women were subliminally exposed to either a sexual or a neutral picture and their sexual arousal was recorded Researchers examined the accessibility of sex related thoughts after following the same procedure with either a pictorial judgment task or lexical decision task The results revealed that the subliminal sexual stimuli did not have an effect on men but for women lower levels of sexual arousal were reported However in conditions related to accessibility of sex related thoughts the subliminal sexual stimuli led to higher accessibility for both men and women 16 Subliminal stimuli can elicit significant emotional changes but these changes are not valuable for a therapeutic effect 17 Spider fearful and non fearful undergraduates experienced either a positive negative or neutral subliminal priming stimulus followed immediately by a picture of a spider or a snake Using visual analogue scales the participants rated the affective quality of the picture No evidence was found to support that the unpleasantness of the pictures can be modulated by subliminal priming 17 Non fearful participants rated the spiders as being more frightening after being primed with a negative stimulus but the event was not found in fearful participants 17 Simple geometric stimuli Edit Laboratory research on unconscious perception often employs simple stimuli e g geometric shapes or colors in which visibility is controlled by visual masking 18 Masked stimuli are then used to prime the processing of subsequently presented target stimuli For instance in the response priming paradigm participants have to respond to a target stimulus e g by identifying whether it is a diamond or a square which is immediately preceded by a masked priming stimulus also a diamond or a square The prime has large effects on responses to the target it speeds responses when it is consistent with the target and slows responses when it is inconsistent Response priming effects can be dissociated from visual awareness of the prime such as when prime identification performance is at chance or when priming effects increase despite decreases in prime visibility 18 The presentation of geometric figures as subliminal stimuli can result in below threshold discriminations 19 The geometric figures were presented on slides of a tachistoscope followed by a supraliminal shock for a given slide every time it appeared The shock was administered after a five second interval Electrical skin changes of the participants that occurred before the reinforcement shock or non reinforcement were recorded The findings indicate that the proportion of electrical skin changes that occurred following subliminal visual stimuli was significantly greater than expected while the proportion of electrical skin changes that occurred in response to the stimuli which were not reinforced was significantly less As a whole participants were able to make below threshold discriminations 19 Word and non word stimuli Edit Another form of visual stimuli is words and non words In a set of experiments words and non words were used as subliminal primes Priming stimuli that work best as subliminal stimuli are words that have been classified several times before they are used to prime Word primes can also be made from parts of practiced words to create new words In this case the actual word used to prime can have the opposite meaning of the words it came from its parents but it will still prime for the meaning of the parent words Non words created from previously practiced stimuli have a similar effect even when they are unpronounceable e g made of all consonants These primes generally only increase response times for later stimuli for a very short period of time milliseconds 22 Masking visual stimuli Edit Visual stimuli are often masked by forward and backward masks so that they can be displayed for longer periods of time without the subject being able to recognize the priming stimuli A forward mask is briefly displayed before the priming stimulus and a backward mask usually follows it to prevent the subject from recognizing the stimulus 23 Auditory stimuli EditAuditory masking Edit One method for creating subliminal auditory stimuli is masking which involves hiding the target auditory stimulus in some way Auditory subliminal stimuli are shown to have some effect on the participant but not a large one 23 For example one study used other speechlike sounds to cover up the target words and it found evidence of priming in the absence of awareness of the stimuli The effects of these subliminal stimuli were only seen in one of the outcome measures of priming while the effects of conscious stimuli were seen in multiple outcome measures 23 However the empirical evidence for the assumption of an impact of auditory subliminal stimuli on human behavior remains weak in an experimental study on the influence of subliminal target words embedded into a music track on choice behavior for a drink 24 authors found no evidence for a manipulative effect Self help audio recordings Edit A study investigated the effects on self concept of rational emotive behavior therapy and auditory subliminal stimulation separately and in combination on 141 undergraduate students with self concept problems They were randomly assigned to one of four groups receiving either rational emotive therapy subliminal stimulation both or a placebo treatment Rational emotive therapy significantly improved scores on all dependent measures cognition self concept self esteem anxiety except behavior Results for the subliminal stimulation group were similar to those of the placebo treatment except for a significant self concept improvement and a decline in self concept related irrational cognitions The combined treatment yielded results similar to those of rational emotive therapy with tentative indications of continued improvement in irrational cognitions and self concept from posttest to follow up 25 Studies on advertising with subliminal stimuli in still images EditAmong the researchers in favor of subliminal stimuli is Wilson Bryan Key 26 One of Key s most cited studies is a whisky ad in which he found several hidden figures in ice cubes 27 However Cecil Adams wrote that Key is someone with a sexual fixation 28 Luis Bassat suggests an interesting observation by indicating that the current objective of advertising is to get the consumer to take into account the brand when making the decision 29 a trend opposed to the objective of subliminal advertising In turn Fernando Ocana showed that the essential thing in the field of media planning is to obtain the greatest possible memory which implies a conscious perception and not an unconscious one as it should be the case Consumption television and criticism EditSome studies looked at the efficacy of subliminal messaging in television Subliminal messages produce only one tenth of the effects of detected messages and the findings related to the effects of subliminal messaging were relatively ambiguous 30 Participants ratings of positive responses to commercials were not affected by subliminal messages in the commercials 30 Johan Karremans suggests that subliminal messages have an effect when the messages are goal relevant 31 In a study researchers made half of the 105 volunteers feel thirsty by giving them food with lots of salt before performing the experiment At the end as predicted they found that the subliminal message had succeeded among the thirsty 80 of them chose a certain ice tea brand versus the 20 of the control group that were not exposed to the message Those who were not thirsty did not choose the drink in question despite the subliminal message The experiment showed that in certain circumstances subliminal advertising worked 32 31 Karremans did a study assessing whether subliminal priming of a brand name of a drink would affect a person s choice of drink and if this effect was caused by the individual s feelings of being thirsty 31 In another study participant s ratings of thirst were higher after viewing an episode of The Simpsons that contained single frames of the word thirsty or of a picture of a Coca Cola can 33 Some studies showed greater effects of subliminal messaging with as high as 80 of participants showing a preference for a particular rum when subliminally primed by the name placed in an ad backward 34 Martin Gardner however criticizes claims such as those by Wilson Bryan Key by pointing out that recent studies serving as the basis for his claims were not identified by place or experimenter He also suggests that claims about subliminal images are due to the tendency of chaotic shapes to form patterns vaguely resembling familiar things 35 In 2009 the American Psychological Association defended that subliminal stimuli are subordinated to previously structured associative stimuli and that their only role is to reinforce a certain behavior or a certain previous attitude without there being conclusive evidence that the stimulus that provokes these behaviors is properly subliminal 36 Currently there is still speculation about this effect Many authors have continued to argue for the effectiveness of subliminal cues in changing consumption behavior citing environmental cues as a main culprit of behavior change 37 Authors who support this line of reasoning cite findings such as Ronald Millman s research that showed slow paced music in a supermarket was associated with more sales and customers moving at a slower pace 38 Findings such as these support the notion that external cues can affect behavior although the stimulus may not fit into a strict definition of subliminal stimuli because although the music may not be attended to or consciously affecting the customers they are certainly able to perceive it Subliminal messaging is prohibited in advertising in the United Kingdom 39 See also EditHypnosis Instances of subliminal messages Neuroethics Peripheral vision horizon display PVHD Pre attentive processing Priming psychology Response priming Subliminal messages in popular culture Suggestibility Unconscious thought theory Criticism of UTTReferences Edit Lewis Charlton T Short Charles sublimis A Latin Dictionary via Perseus Project Loftus Elizabeth F Klinger Mark R June 1992 Is the unconscious smart or dumb American Psychologist 47 6 761 65 doi 10 1037 0003 066X 47 6 761 PMID 1616173 Brooks S J Savov V Allzen E Benedict C Fredriksson R Schioth H B February 2012 Exposure to subliminal arousing stimuli induces robust activation in the amygdala hippocampus anterior cingulate insular cortex and primary visual cortex a systematic meta analysis of fMRI studies NeuroImage 59 3 2962 2973 doi 10 1016 j neuroimage 2011 09 077 PMID 22001789 a b c d Schlaghecken F Eimer M 2004 Subliminal stimuli can bias free choices between response alternatives Psychonomic Bulletin amp Review 11 3 463 468 doi 10 3758 bf03196596 PMID 15376796 a b c d e Verwijmeren Thijs Karremans Johan C Stroebe Wolfgang Wigboldus Daniel H J April 2011 The workings and limits of subliminal advertising The role of habits Journal of Consumer Psychology 21 2 206 213 doi 10 1016 j jcps 2010 11 004 ISSN 1057 7408 a b Trappey R 2014 Brand choice revealing customers unconscious automatic and strategic thinking processes Palgrave Macmillan ISBN 978 1 349 52357 3 OCLC 945231870 a b c d Chessman Jim Merikle Philip M 1984 Priming with and without awareness Perception and Psychophysics 36 4 387 395 doi 10 3758 bf03202793 PMID 6522236 a b c Reingold Eyal M Merikle Philip M 1988 Direct and indirect measures to study perceptions without awareness Perception and Psychophysics 44 6 563 575 doi 10 3758 bf03207490 PMID 3200674 a b Greenwald Anthony G Klinger Mark R Schuh Eric S 1995 Activation by marginally Perceptible Subliminal Stimuli Dissociation of Unconscious From Conscious Cognition Journal of Experimental Psychology 124 1 22 42 doi 10 1037 0096 3445 124 1 22 PMID 7897340 a b c Krosnick J A Betz A L Jussim L J Lynn A R 1992 Subliminal Conditioning of Attitudes Personality and Social Psychology Bulletin 18 2 152 162 doi 10 1177 0146167292182006 S2CID 145504287 a b c Williams L M Liddell B J Kemp A H Bryant R A Meares R A Peduto A S Gordon E 2006 Amygdala prefrontal dissociation of subliminal and supraliminal fear Human Brain Mapping 27 8 652 661 doi 10 1002 hbm 20208 PMC 6871444 PMID 16281289 Baldwin M Carrell D F Lopez D F 1990 Priming relationship schemas My advisor and the pope are watching me from the back of my mind PDF Journal of Experimental Social Psychology 26 5 435 454 CiteSeerX 10 1 1 321 544 doi 10 1016 0022 1031 90 90068 W Lee Su Young Kang Jee In Lee Eun Namkoong Kee An Suk Kyoon February 2011 Differential priming effect for subliminal fear and disgust facial expressions Attention Perception amp Psychophysics 2 73 2 473 481 doi 10 3758 s13414 010 0032 3 PMID 21264732 Ibanez Agustin Hurtado Esteban Lobos Alejandro Escobar Josefina Trujillo Natalia Baez Sandra Huepe David Manes Facundo Decety Jean 29 June 2011 Subliminal presentation of other faces but not own face primes behavioral and evoked cortical processing of empathy for pain Brain Research 1398 72 85 doi 10 1016 j brainres 2011 05 014 PMID 21624566 S2CID 20717144 Yang Zixu Tong Eddie M W 2010 The Effects of Subliminal Anger and Sadness Primes on Agency Appraisals Emotion 10 6 915 922 doi 10 1037 a0020306 PMID 21058845 a b Gillath Omri Mikulincer Mario Birnbaum Gurit E Shaver Phillip R May 2007 Does subliminal exposure to sexual stimuli have the same effects on men women PDF Journal of Sex Research 2 44 2 111 121 CiteSeerX 10 1 1 581 7310 doi 10 1080 00224490701263579 PMID 17599269 S2CID 38357734 a b c d Mayer Birgit Merckelbach Harald 10 December 1998 Do subliminal priming effects on emotion have clinical potential Anxiety Stress amp Coping 12 2 217 229 doi 10 1080 10615809908248330 a b c Vorberg D Mattler U Heinecke A Schmidt T Schwarzbach J 2003 Different time courses for visual perception and action priming Proceedings of the National Academy of Sciences USA 100 10 6275 6280 Bibcode 2003PNAS 100 6275V doi 10 1073 pnas 0931489100 PMC 156362 PMID 12719543 a b c Taylor Frank W R March 1953 The discrimination of subliminal visual stimuli Canadian Journal of Experimental Psychology 1 7 1 12 20 doi 10 1037 h0083570 PMID 13032835 Kouider S Dehaene S May 2007 Levels of processing during non conscious perception a critical review of visual masking Philos Trans R Soc Lond B Biol Sci 362 1481 857 75 doi 10 1098 rstb 2007 2093 PMC 2430002 PMID 17403642 www monyms ir Abrams R L Greenwald A G 2000 Parts outweigh the whole word in unconscious analysis of meaning Psychological Science 11 2 118 124 CiteSeerX 10 1 1 79 8405 doi 10 1111 1467 9280 00226 PMID 11273418 S2CID 6563451 a b c Breitmeyer B G Ogmen H 2007 Visual Masking Scholarpedia 2 7 3330 Bibcode 2007SchpJ 2 3330B doi 10 4249 scholarpedia 3330 Egermann Hauke Kopiez Reinhard Reuter Christoph 2007 Is there an effect of subliminal messages in music on choice behavior Journal of Articles in Support of the Null Hypothesis 4 2 29 64 Comparison of the effects of auditory subliminal stimulation and rational emotive therapy separately and combined on self concept Moller AT Kotze HF Sieberhagen KJ Department of Psychology University of Stellenbosch RSA Chen Adam Expert discusses the effects of subliminal advertising Johns Craig M Wilson Bryan Key is insane University of Iowa Archived from the original on 2007 01 08 Adams Cecil 26 June 1987 Are subliminal messages secretly embedded in advertisements straightdope com Bassat Luis Libro rojo de la publicidad Editorial Planeta Barcelona 2003 a b Smith Kirk H Rogers Martha 1994 Effectiveness of subliminal messages in television commercials Two experiments Journal of Applied Psychology 79 6 866 874 doi 10 1037 0021 9010 79 6 866 a b c Karremans Johan C Stroebe Wolfgang Claus Jasper 2006 11 01 Beyond Vicary s fantasies The impact of subliminal priming and brand choice Journal of Experimental Social Psychology 42 6 792 798 doi 10 1016 j jesp 2005 12 002 ISSN 0022 1031 Motluk Alison Subliminal advertising may work after all New Scientist Retrieved 2020 11 02 Cooper Joel Cooper Grant 2002 Subliminal motivation A story revisited Journal of Applied Social Psychology 32 11 2213 2227 doi 10 1111 j 1559 1816 2002 tb01860 x Key W B 1973 Subliminal seduction Ad media s manipulation of a not so innocent America Englewood Cliffs NJ Prentice Hall ISBN 978 0 13 859090 1 Radford Benjamin September October 2019 Subliminal Advertising Trumpian and Otherwise Skeptical Inquirer Vol 43 no 5 Center for Inquiry pp 28 29 Los mensajes subliminales si funcionan BBC Mundo Londres BBC 28 September 2009 Retrieved 3 July 2016 Dijksterhuis Ap Smith Pamela K van Baaren Rick B Wigboldus Daniel H J 2005 The unconscious consumer Effects of environment on consumer behavior Journal of Consumer Psychology 15 3 193 202 CiteSeerX 10 1 1 167 6867 doi 10 1207 s15327663jcp1503 3 Milliman Ronald E 1982 Using Background Music to Affect the Behavior of Supermarket Shoppers Journal of Marketing 46 3 86 91 doi 10 2307 1251706 JSTOR 1251706 Section 3 Misleading advertising BCAP Code Committees on Advertising Practice CAP 2013 Retrieved 6 January 2014 No advertisement may use images of very brief duration or any other technique that is likely to influence consumers without their being fully aware of what has been done Further reading EditBoese Alex 2006 Hippo Eats Dwarf A Field Guide to Hoaxes and Other B S Orlando Harcourt pp 193 195 ISBN 978 0 15 603083 0 Dixon Norman F 1971 Subliminal Perception The nature of a controversy New York McGraw Hill ISBN 978 0 07 094147 2 Greenwald A G 1992 New Look 3 Unconscious cognition reclaimed PDF American Psychologist 47 6 766 779 doi 10 1037 0003 066X 47 6 766 PMID 1616174 Holender D 1986 Semantic activation without conscious identification in dichotic listening parafoveal vision and visual masking A survey and appraisal PDF Behavioral and Brain Sciences 9 1 1 23 doi 10 1017 s0140525x00021269 S2CID 145629913 Merikle P M Daneman M 1998 Psychological Investigations of Unconscious Perception Journal of Consciousness Studies 5 1 5 18 United States Senate Ninety ninth Congress First Session on Contents of Music and the Lyrics of Records September 19 1985 Record Labeling Hearing before the Committee on Commerce Science and Transportation Washington DC U S Government Printing Office a href Template Citation html title Template Citation citation a CS1 maint multiple names authors list link Watanabe T Nanez J Sasaki Y 2001 Perceptual learning without perception Nature 413 6858 844 848 Bibcode 2001Natur 413 844W doi 10 1038 35101601 PMID 11677607 S2CID 4381577 Retrieved from https en wikipedia org w index php title Subliminal stimuli amp oldid 1131721188, wikipedia, wiki, book, books, library,

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