Although much of the research on small groups in social psychology has emphasized cognitive, information-processing tasks (decision-making and problem solving), only recently have groups been conceptualized as information-processing systems. Partially due to this new conceptualization, group research is on the rise, yet much of this research is discipline specific. Few attempts have been made to integrate this research to provide common themes or frameworks across disciplinary boundaries. We propose that one potential unifying theme underlying much of the recent research on groups is ‘social sharedness’: the degree to which cognitions, preferences, identities, etc. are shared and are being shared within groups. Through a targeted review of the literature, we attempt to demonstrate that social sharedness is central to understanding group decision-making, provides a tie between past and current group research, and can serve a unifying function for future endeavors.
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