Wegner, Giuliano, and Hertel (1985) defined the notion of a transactive memory system (TMS) as a group level memory system that “involves the operation of the memory systems of the individuals and the processes of communication that occur within the group (p. 191). Those processes are the collaborative procedures (“transactions”) by which groups encode, store, and retrieve information that is distributed among their members. Over the past 25+ years, the conception of a TMS has progressively garnered an increased interest among (...) social and organizational psychologists, communication scholars, and management theorists (Ren & Argote 2011). But there remains considerable disagreement about how exactly Wegner’s appeal to group memory should be understood. My goal in this paper is contribute to this debate, by articulating more clearly the value of conceptualizing groups as TMSs. This value, I argue, consists in providing us with a blueprint for how to explain group memory in terms of collective information-processing mechanisms. Collective information-processing mechanisms are dependent on, and interact with, the brain-bound information-processing of individuals, but cannot be reduced to the latter. In my analysis, I lean on extant accounts of mechanistic explanation in the philosophy of science (Bechtel & Richardson 1993; Machamer, Darden, & Craver 2000; Wimsatt 2007) that have been used to analyze the explanatory practices of psychology and cognitive neuroscience (Bechtel 2008, 2009). Based on my reconstruction of Wegner’s conceptualization of a TMS, I argue that the reality of emergent group cognition is compatible with its mechanistic explanation. More generally, my analysis shows that group cognition cannot be reduced to individual cognition, while avoiding the false dilemma between “wholism” and “nothing but-ism” which has hampered traditional construals of the “group mind” thesis (Allport 1968). (shrink)

We often remember in the company of others. In particular, we routinely collaborate with friends, family, or colleagues to remember shared experiences. But surprisingly, in the experimental collaborative recall paradigm, collaborative groups remember less than their potential, an effect termed collaborative inhibition. Rajaram and Pereira-Pasarin (2010) argued that the effects of collaboration on recall are determined by “pre-collaborative” factors. We studied the role of 2 pre-collaborative factors—shared encoding and group relationship—in determining the costs and benefits of collaborative recall. In Experiment (...) 1, we compared groups of strangers who encoded alone versus together, before collaborating to recall. In Experiment 2, we compared groups of friends who encoded alone versus together, before collaborating to recall. We found that shared encoding abolished collaborative inhibition in both Experiments 1 and 2. But prior relationship did not influence collaborative inhibition over and above the effects of shared encoding. Regardless of encoding condition, collaborative group recall contained fewer intrusions than nominal group recall, and these benefits continued in subsequent individual recall. Our findings demonstrate that pre-collaborative factors—specifically shared encoding—have flow-on benefits for group and individual recall amount, but not recall accuracy. We discuss these findings in terms of self- and cross-cuing in collaborative recall. (shrink)

Maswood and Rajaram examine the transmission of false memories across small and larger networks. While the spread of false memories is not inherently beneficial, Maswood & Rajaram argued that a better understanding of the formation and propagation of false memories has practical and societal implications. For example, by better understanding how false memories transmit across groups, we might be better equipped to prevent detrimental behaviors that arise as a result of “fake news.”.

Recalling autobiographical memories with others can influence the quality of recall, but little is known about how features of the group influence memory outcomes. In two studies, we examined how the products and processes of autobiographical recall depend on individual vs. collaborative remembering and the relationship between group members. In both studies, dyads of strangers, friends, and siblings recalled autobiographical events individually (elicitation), then either collaboratively or individually (recall). Study 1 involved typing memory narratives; Study 2 involved recalling aloud. We (...) examined shifts in vividness, emotionality, and pronoun use within memory narratives produced by different relationship types. In Study 2, we also coded collaborative dyads’ “collaborative processes” or communication processes. In Study 1, all relationships showed decreased positive emotion and I-pronouns and increased negative emotion within collaboratively-produced memory narratives. In Study 2, all relationships showed increased vividness, reduced emotionality and positive and negative emotion, and increased I- and we-pronouns within collaborativelyproduced memory narratives. However, strangers used collaborative processes differently from friends and siblings. Some collaborative processes were associated with memory qualities. Across studies, collaboration influenced memory quality more than did relationship type, but relationship type influenced dyads’ recall dynamics. These findings indicate the complexity of social influences on memory. (shrink)