Identifying adaptation by dysfunction

Behavioral and Brain Sciences 25 (4):521-522 (2002)
Specifying exact selection pressures for identifying adaptations is unnecessary. Novel behaviors are not spandrels since they can only develop because of prior functions. An adaptationist approach has a high prior probability, whereas spandrel hypotheses attempt to prove a negative. The concept of maladaptive spandrel is criticized. The utility of dysfunctional states for identification of adaptations gone wrong is emphasized.
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DOI 10.1017/S0140525X02390095
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