On the feasibility of criterion-related validity: The effects of range restriction assumptions on needed sample size

Paul R. Sackett, Bruce E. Wade

Research output: Contribution to journalArticlepeer-review


F. L. Schmidt et al argued that the average (median sample size 68) validity study has a 50% chance of detecting validity if validity exists. They assumed direct range restriction (RR) in determining the sample size needed for adequate power. Because indirect RR is more typical, 4 tables indicating required sample sizes under indirect RR are presented. Contrary to Schmidt et al, sample sizes needed under indirect RR are substantially smaller than those needed under direct RR. Under indirect RR, the average validity study has a 75% chance of detecting validity if validity exists when a 1-tailed test can be used. (13 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved).

Original languageEnglish (US)
Pages (from-to)374-381
Number of pages8
JournalJournal of Applied Psychology
Issue number3
StatePublished - Aug 1983
Externally publishedYes


  • computer program used to develop tables of required sample size under indirect range restriction, criterion-related validity, extension of work of F. L. Schmidt et al

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