Humans spend a majority of their lives in a social context. So historically, several disciplines have pursued a study of the social aspects of memory. Yet, research on memory in cognitive psychology has, for more than a century, concentrated mainly on individuals working in isolation. A recent shift in this orientation has led to a rapid growth in cognitive research revealing both counterintuitive and complex effects of collaboration on learning and remembering. For example, despite subjective reports to the contrary, collaboration impairs a group’s recall performance compared to its potential. Yet, individual group members also show improvements in recall after collaboration. This article highlights the role of cognitive mechanisms in producing these and other benefits and costs of collaboration and in shaping both individual and collective memories.
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