Peršin, Monika.
(2017).
Psychometric properties of DAT battery subtests in selection procedure.
Diploma Thesis. Filozofski fakultet u Zagrebu, Department of Psychology.
[mentor Parmač Kovačić, Maja].
Abstract
One of the most used ability tests in professional selection, is the DAT battery. For the purpose of selection, it is useful to develop norms within the company running the selection proccess, as it is important to compare job applicants with the group most similar to them. The goal of this study was to develop norms for one large internet company and to explore the psychometric characteristics of two DAT subtests (Verbal and Abstract reasoning test): sensitivity, reliability and factor validity. It was tested whether there were statistically significant differences in test results between job applicants and a group of Croatian high school students who participated in test standardization in 2005. and whether there were differences in test results depending on gender and professional qualification.
For both subtests, the distributions of the results are normal. For Verbal reasoning test, sensitivity indicator Ferguson δ is .94, and for Abstract reasoning .97. Appropriate difficulty of tests is proved by the difficulty index: pt = .55 for Verbal reasoning and pt = .53 for Abstract reasoning. Reliability for Verbal reasoning test is satisfactory (α = .71) and high for Abstract reasoning (α = .88). Factor analysis of both subtests showed there were more than one underlaying factor. Job applicants had statistically lower results compared to the group of high school students from Croatian standardization in 2005. Statistically significant differences in results were found depending on the professional qualification for Verbal reasoning test, where the group with higher professional qualification scored higher. There were no such differences in the Abstract reasoning test. A gender difference was found in the Abstract reasoning test, where men score higher, but this difference is significant only for job applicants with lower proffessional qualification. Due to nonrepresentativity, these findings cannot be generalised on population.
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