Inferring Behavior From Partial Social Information Plays Little or No Role in the Cultural Transmission of Adaptive Traits

Many human cultural traits become increasingly beneficial as they are repeatedly transmitted, thanks to an accumulation of modifications made by successive generations. But how do later generations typically avoid modifications which revert traits to less beneficial forms already sampled and rejected by earlier generations? And how can later generations do so without direct exposure to their predecessors' behavior? One possibility is that learners are sensitive to cues of non-random production in others' behavior, and that particular variants (e.g., those containing structural regularities unlikely to occur spontaneously) have been produced deliberately and with some effort. If this non-random behavior is attributed to an informed strategy, then the learner may infer that apparent avoidance of certain possibilities indicates that these have already been sampled and rejected. This could potentially prevent performance plateaus resulting from learners modifying inherited behaviors randomly. We test this hypothesis in four experiments in which participants, either individually or in interacting dyads, attempt to locate rewards in a search grid, guided by partial information about another individual's experience of the task. We find that in some contexts, valid inferences about another's behavior can be made from partial information, and these inferences can be used in a way which facilitates trait adaptation. However, the benefit of these inferences appears to be limited, and in many contexts—including some which have the potential to make inferring the experience of another individual easier—there appears to be no benefit at all. We suggest that inferring previous behavior from partial social information plays a minimal role in the adaptation of cultural traits.     

flesh journeys: neo primitives and the contemporary rediscovery of radical body modification

Viewing the body as both an evocative social text and a vehicle of social resistance, this article explores recent developments within the Neo Primitive (NP) movement. As a segmented branch of the larger body modification cultural scene, Neo Primitives have created individuals have created a renaissance of deeply flamboyant and often radical body marking practices. Members stress the spiritual, emotional, and practical rewards of body modification for those entrenched within (and ultimately oppressed by) hegemonic boundaries of physical expression in the modern metropolis, especially as those boundaries relate to codes of beauty, gender, sexuality, spirituality, and personal creativity. Building on qualitative data gathered in two Canadian cities, and viewing members of this subculture as active agents of counter-expression and dissent, this article explores the ideologies, practices, and lived experiences of NPs attempting to recreate, reclaim, and revolutionize the flesh.