The impact of subliminal haptic perception on the preference discrimination of roughness and compliance.
Identifieur interne : 000F02 ( PubMed/Curation ); précédent : 000F01; suivant : 000F03The impact of subliminal haptic perception on the preference discrimination of roughness and compliance.
Auteurs : Marcos Hilsenrat [Israël] ; Miriam ReinerSource :
- Brain research bulletin [ 1873-2747 ] ; 2011.
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Abstract
It is well known that unaware exposure to a visual stimulus increases the preferability of the associated object. In this study we examine whether the same phenomena occur for haptic stimuli. Using a touch-enabled virtual environment, we tested whether people that touch two virtual surfaces, which differ by imperceptible differences in roughness or compliance, tend to choose rougher or smoother, softer or stiffer surfaces, in accordance with their natural tendency. In forced choice preference tests, participants were first asked to choose between two surfaces that differ by roughness/stiffness. Stimuli strength was above the aware perception limit. Then, the same test was performed for differences in stimuli strength, which was below the limit of awareness. Finally, we carried out a recognition test: participants were asked to choose between the surfaces presented in the previous step, and point at the smoother or softer surface, respectively. For each stimulus, two groups of 26 subjects participated. Results show that in the unaware preference tests, participants selected the surface in accordance with the aware preference tests, with significant difference from chance (59.5%, and 60.2% for roughness and compliance as a stimulus, respectively). The recognition tests in both experiments were at chance level, suggesting that participants were unaware of the difference in stimuli. These results show that subliminal perception of roughness and compliance strength affects texture preferences. Research data suggest that the amygdala is central in regulating emotional processing of visual stimuli, even if it is presented subliminally. Thus, the results of this study raise the question whether the amygdala also modulates emotional haptic stimuli when they are subliminally perceived.
DOI: 10.1016/j.brainresbull.2011.03.016
PubMed: 21440607
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In this study we examine whether the same phenomena occur for haptic stimuli. Using a touch-enabled virtual environment, we tested whether people that touch two virtual surfaces, which differ by imperceptible differences in roughness or compliance, tend to choose rougher or smoother, softer or stiffer surfaces, in accordance with their natural tendency. In forced choice preference tests, participants were first asked to choose between two surfaces that differ by roughness/stiffness. Stimuli strength was above the aware perception limit. Then, the same test was performed for differences in stimuli strength, which was below the limit of awareness. Finally, we carried out a recognition test: participants were asked to choose between the surfaces presented in the previous step, and point at the smoother or softer surface, respectively. For each stimulus, two groups of 26 subjects participated. Results show that in the unaware preference tests, participants selected the surface in accordance with the aware preference tests, with significant difference from chance (59.5%, and 60.2% for roughness and compliance as a stimulus, respectively). The recognition tests in both experiments were at chance level, suggesting that participants were unaware of the difference in stimuli. These results show that subliminal perception of roughness and compliance strength affects texture preferences. Research data suggest that the amygdala is central in regulating emotional processing of visual stimuli, even if it is presented subliminally. Thus, the results of this study raise the question whether the amygdala also modulates emotional haptic stimuli when they are subliminally perceived.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">21440607</PMID><DateCreated><Year>2011</Year><Month>06</Month><Day>14</Day></DateCreated><DateCompleted><Year>2011</Year><Month>09</Month><Day>30</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1873-2747</ISSN><JournalIssue CitedMedium="Internet"><Volume>85</Volume><Issue>5</Issue><PubDate><Year>2011</Year><Month>Jun</Month><Day>30</Day></PubDate></JournalIssue><Title>Brain research bulletin</Title><ISOAbbreviation>Brain Res. 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Then, the same test was performed for differences in stimuli strength, which was below the limit of awareness. Finally, we carried out a recognition test: participants were asked to choose between the surfaces presented in the previous step, and point at the smoother or softer surface, respectively. For each stimulus, two groups of 26 subjects participated. Results show that in the unaware preference tests, participants selected the surface in accordance with the aware preference tests, with significant difference from chance (59.5%, and 60.2% for roughness and compliance as a stimulus, respectively). The recognition tests in both experiments were at chance level, suggesting that participants were unaware of the difference in stimuli. These results show that subliminal perception of roughness and compliance strength affects texture preferences. Research data suggest that the amygdala is central in regulating emotional processing of visual stimuli, even if it is presented subliminally. Thus, the results of this study raise the question whether the amygdala also modulates emotional haptic stimuli when they are subliminally perceived.</AbstractText><CopyrightInformation>Copyright © 2011 Elsevier Inc. 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