Subliminal Gestalt grouping: Evidence of perceptual grouping by proximity and similarity in absence of conscious perception |
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| Affiliation: | 1. Laboratoire de Biologie Cellulaire et Moléculaire, Faculté des Sciences Biologiques, Université des Sciences et de la Technologie Houari Boumediene, USTHB, Alger, Algeria;2. Laboratoire d''Immunobiologie, Département de Biologie Moléculaire, Université Libre de Bruxelles, Gosselies, Belgium;1. School of Information Technology, Jiangxi University of Finance and Economics, Nanchang 330032, Jiangxi, China;2. College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai 201418, China;3. Artificial Intelligence Research Center, National Institute of Advanced Industrial Science and Technology, Japan;4. School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, China |
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| Abstract: | Previous studies making use of indirect processing measures have shown that perceptual grouping can occur outside the focus of attention. However, no previous study has examined the possibility of subliminal processing of perceptual grouping. The present work steps forward in the study of perceptual organization, reporting direct evidence of subliminal processing of Gestalt patterns. In two masked priming experiments, Gestalt patterns grouped by proximity or similarity that induced either a horizontal or vertical global orientation of the stimuli were presented as masked primes and followed by visible targets that could be congruent or incongruent with the orientation of the primes. The results showed a reliable priming effect in the complete absence of prime awareness for both proximity and similarity grouping principles. These findings suggest that a phenomenal report of the Gestalt pattern is not mandatory to observe an effect on the response based on the global properties of Gestalt stimuli. |
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| Keywords: | Perceptual grouping Visual masking Subliminal priming Proximity Similarity |
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