This Funding Opportunity Announcement (FOA), issued as part of the NIH Basic Behavioral and Social Sciences Opportunity Network (OppNet), encourages research grant applications investigating multisensory processing in perception or other behavioral and social outcomes. The FOA is intended to support basic behavioral research projects focused on two or more sensory modalities. This includes research examining ways in which cognitive or affective processes interact with multisensory input to influence basic behavioral targets. While evidence suggests that sensory input is processed interactively instead of additively, research is less developed regarding how different modalities are integrated for perception and behavioral or social outcomes.