Coactive processing of sensory signals for in-group but not out-group stimuli |
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Authors: | Zargol Moradi Alla Yankouskaya Mihaela Duta Miles Hewstone Glyn W. Humphreys |
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Affiliation: | 1. Department of Experimental Psychology, University of Oxford, South Parks Road, Oxford OX1 3UD, UKzahra.moradi@psy.ox.ac.uk;3. Department of Experimental Psychology, University of Oxford, South Parks Road, Oxford OX1 3UD, UK;4. Department of Speech and Language, University of Hong Kong, Hong Kong |
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Abstract: | ABSTRACTThere is ample evidence showing that decision times are shorter when detecting two targets for which the same response is required, compared to when only one of the targets is present—resulting in a redundancy gain. Though effects of perceptual manipulations on redundancy gains are established, effects of social associations are still unclear. Here, we examined for the first time whether associating arbitrary stimuli with in-group as opposed to out-group targets modulates redundancy gains. Participants made associations between a shape, a colour and either in- or out-group labels. They then had to discriminate whether in- or out-group stimuli appeared (single or redundant features). Responses to in-group but not to out-group stimuli violated predictions of models in which the associated features are processed independently, and were consistent with in-group stimuli being processed with super-capacity. Our results, replicated across two experiments, providing the first evidence that there is enhanced perceptual integration for information associated with an in-group. |
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Keywords: | Redundancy gain in-group out-group capacity coefficient |
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