I__. - International Military Testing Association

The criterion is a dichotomous measure of attrition. Personnel who were voluntarily
or involuntarily discharged from service prior to the completion of their service contracts were
coded “I “. Those personnel with medical disability, officer schoo! discharges, service breach
of contract, and the dead were excluded from analysis. All other personnel were coded as “0”.
The biodata instrument (ASP-I) was administered to all active duty military applicants
in the United States for a three month period (N = 120,175). The sample utilized in the
following analyses consisted of 55,675 personnel who enlisted after the applicant
administration. The applicant and accession samples were generally representative of military
populations (Trent, Quenette, Ward & Laabs, 1990).
Results
points.
Figure 1 graphically portrays average attrition rates at each of the biodata raw score
I
I
0
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m Do m 100 tm 110 11, 1-m tra
ASAP Raw Score
130 tl5
Ftgure 1. Attrition rates by ASP-l score
Table 2 shows the simple and incremental validities with the biodata score (ASP-l)
forced into the regression equation last. This analysis was performed on a random one-half
of the sample (“model construction” group; E. = 26,991). Aside from ASP-l and AFQT, the
predictor variables were dummy coded. Validities for high school diploma, two or more years
of college, AFQT, age 17, no credential, GED, and ASP were corrected for restriction of range
using a univariate formula (Thorndike, 1982). Validities for employment status and
misdemeanor/felony were not corrected because operational selection procedures resukd in
larger accession sample variances as compared to applicant sample variances.
The trJe
unrestricted variance of the misdemeanor/felony measure is unknown since most potential
applicants in this category are screened out at the recruiter level and do not reach the applicant
testing stage.
400
.