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Maladaptive By-Product Hypothesis

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Synonyms

Ecological trap; Evolutionary mismatch; Evolutionary trap; Mismatch theory; Maladaptation

Definition

In evolutionary psychology, maladaptive theory holds that some human behaviors are the result of past selective forces that are no longer operative, usually because of changes in the physical and social environment, resulting in behaviors that are no longer beneficial for fitness.

A maladaptation is a feature of an organism that, despite being genetically encoded or influenced, hinders the biological fitness of the individuals that bear it. Rarely is it straightforward to determine that a given trait is unambiguously maladaptive. Indeed, as noted by Crespi (2000), “Conditions for unambiguously identifying maladaptation are considerably more stringent than those for demonstrating adaptation.” Nevertheless, the existence of maladaptive physical and behavioral traits is undeniable and reminds us of the limits of adaptationist explanations for human behaviors.

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Correspondence to Nathan H. Lents .

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Lents, N.H. (2019). Maladaptive By-Product Hypothesis. In: Shackelford, T., Weekes-Shackelford, V. (eds) Encyclopedia of Evolutionary Psychological Science. Springer, Cham. https://doi.org/10.1007/978-3-319-16999-6_3020-1

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  • DOI: https://doi.org/10.1007/978-3-319-16999-6_3020-1

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  • Print ISBN: 978-3-319-16999-6

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