Construction and Validation of a Biodata Selection Instrument

Abstract

Biodata instruments can be used in selection for several purposes (including screening, prediction, analysis of decision strategies). This article is concerned with the construction and validation of a biodata instrument for the selection of intermediaries by a profit-making employment agency in the Netherlands. The instrument was constructed according to the sample approach and measures work experiences with regard to relevant tasks and job dimensions. A field study gathered biodata scores from applicants (n £ 300) and present employees (n £ 70), interview ratings from the applicants, and ratings of job performance for the employees. The results obtained indicated that the instrument was a potentially useful selection device. The homogeneity of scale scores was sufficient and the scores show little overlap with other selection devices (interview ratings). In addition, particular scores correlate at a statistically significant level (P < 0.01) with ratings of job performance of present employees (r £ 0.30 to 0.40). Estimates of the utility (financial gains) of using the instrument in selection revealed that the instrument may yield considerable pay-offs. It is concluded that the construction and validation of the instrument yielded several positive results, and that the sample approach in constructing biodata selection instruments is an option worth considering.