The criterion-related validities of empirical, rational, and hybrid keying procedures for a biodata inventory were compared at different sample sizes. Rational keying yielded the lowest validities. Hybrid keying performed best at the smallest sample sizes studied, followed by empirical keying at moderate sizes, and stepwise regression weighting of items at the largest sample sizes.

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Five quasi‐rational biodata scales were developed by empirically keying biodata items to predict scores on a measure of the Big Five dimensions of personality. The criterion‐related validities of the quasi‐rational scales were compared to empirical and rational biodata keying methods using supervisory ratings of job performance as the criterion. Empirical keying outperformed the quasi‐rational and rational methods (which had similar validities).

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