In the opinion of psychiatrists it should be possible to detect at the time of recruitment a considerable proportion of those later destined to prove unsuitable owing to psychiatric disabilities. Examination by psychiatrists, however, takes a considerable time, and it is impossible for them to examine fully more than a certain proportion of entrants. Thus, in all countries during the war the need has been felt for a preliminary screening procedure to indicate those for whom a full psychiatric interview is desirable. It is the purpose of this paper to outline a method differing in certain ways from those previously described.