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Published online by Cambridge University Press: 30 August 2017
Tett, Hundley, and Christiansen (2017) argue that the concept of validity generalization in meta-analysis is a myth, as the variability of the effect size appears to decrease with increasing moderator specificity such that the level of precision needed to deem an estimate “generalizable” is actually reached at levels of situational specificity that are so high as to (paradoxically) refute an inference of generalizability. This notion highlights the need to move away from claiming that effects are either “generalizable” or “situationally specific” and instead look more critically and less dichotomously at degrees of generalizability, or effect size variability.