The Efficacy of the General Aptitude Test Battery in Allocating Prisoners to Work and Trade Training Courses

Ninety trainees at Deerbolt Borstal, County Durham, were randomly assigned to four groups for placement on trade training courses and work. The first group was assigned on the basis of the General Aptitude Test Battery and a brief interview about their interests; the second group on the basis of the General Aptitude Test Battery; the third group on the interview about their interests; whilst the fourth group was assigned randomly to existing vacancies. A 16-week follow-up showed significant differences across the groups in terms of successfully completing placements, the General Aptitude Test Battery being the crucial factor in allocating individuals successfully. Ratings of trainee performance from supervisors taken after two weeks did not, however, show significant differences across the groups.