In a study that builds on recent cognitive neuroscience research on body perception and social psychology research on social relations, we tested the hypothesis that synchronous multisensory stimulation leads to self-other merging. We brushed the cheek of each study participant as he or she watched a stranger's cheek being brushed in the same way, either in synchrony or in asynchrony. We found that this multisensory procedure had an effect on participants' body perception as well as social perception. Study participants exposed to synchronous stimulation showed more merging of self and the other than participants exposed to asynchronous stimulation. The degree of self-other merging was determined by measuring participants' body sensations and their perception of face resemblance, as well as participants' judgment of the inner state of the other, closeness felt toward the other, and conformity behavior. The results of this study show how multisensory integration can affect social perception and create a sense of self-other similarity.

A debated issue in the multisensory literature concerns the relative contribution of bottom-up sensory components versus top-down cognitive elaborations in contributing to the rise and persistency of bodily illusion. Previous studies, for instance, have shown that simultaneity of sensory inputs and plausibility of the stimulated object play an important role in the rubber hand phenomenon, whereas violation of tactile expectancy does not disrupt the illusory feeling to own a fake hand. The present research examined this issue in the context of the "enfacement" phenomenon (i.e., self-other face-perception modification), using entirely arbitrary and non-ecological pairs of visual and tactile events. Visual and tactile stimulation was matched in terms of spatial location, but not linked by any previously learned associations, making temporal synchrony a critical binding factor. Participants received electro-tactile stimulations on their cheek, while they watched the face of a stranger illuminated on the cheek with a dot of white light. Synchronous (vs. asynchronous) stimulations yielded the enfacement effect. In addition, the stranger stimulated in synchrony was judged as more similar, physically and in terms of personality, and as closer to the self. These findings suggest that synchronous multisensory stimulation on the face can produce both perceptual and social binding, even in the absence of any previously learned associations between the stimulations.

In the present research, we investigated the combined role of accent (native vs. nonnative) and race (European native or White vs. nonnative or Black) in real-time in-group categorization among Italian participants. We found that targets presenting mixed cues (i.e., Black persons with a native accent and White persons with a nonnative accent) led to the simultaneous and parallel activation of in-group and out-group representation in the early stage of person perception, showing that both accent and appearance were initially processed. However, later in the process, when accent and appearance did not match, the first played a major role in the participants’ construal of the target as “one of us.” Finally, we examined the role of social identification, beliefs on the importance of language and race, prejudice, social dominance, and contacts with first-generation Italians in the categorization process. Theoretical and applied implications of the findings are discussed.

Cues of leadership are features that signal who is (or who is expected to be) the leader in a specific context. Although their use is widespread, empirical research is scarce, especially for spatial positioning as a sign of leadership. Based on work on spatial biases, we suggest here that the upper-left corner of a page is a spatial position associated with leadership. In the present studies (N = 455), we investigated this hypothesis and showed that a layout with a photograph positioned in the upper-left corner (compared to the upper-right, lower-left, or lower-right corner) led people to infer that the person portrayed in the photograph had a leading (vs. subordinate) role in the organization. Participants also thought that the upper-left corner was the ideal spatial position to convey a leading (vs. subordinate) role in an organization. Implications of these results for symbols of leadership and spatial biases are discussed.

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