A review of the literature on behavioral genetics, published online today by Developmental Psychobiology, finds “powerful new methods have failed to reveal even one bona fide, replicable gene effect pertinent to the normal range of variation in intelligence and personality. There is no explanatory or predictive value in that genetic information … Genetically, the disorders are heterogeneous; different cases with the same diagnosis have different causes. The promises of the molecular genetic revolution have not been fulfilled in behavioral domains of most interest to human psychology.”
Wahlsten, D. “The hunt for gene effects pertinent to behavioral traits and psychiatric disorders: From mouse to human.” Developmental Psychobiology, online June 8, 2012
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