“…It is difficult to try to account for the divergent conclusions of the prognostic studies on the basis of any general characteristics, because relatively few investigators specified the important conditions which characterized their experiments. Thus, of 28 prognostic studies with the Rorschach, 19 (all but 20,22,38,40,47,56,59,66,76) did not specify the duration of illness of the patients and seven (30,34,54,55,63,67,75) failed to state the time of follow-up. 8 Of 10 MMPI prognostic studies (8,15,16,21,24,26,50,51,52,69), five reported that the prognoses applied to the broad diagnostic category of "psychiatric patients" (15,16,24,26,52), only about one third specified the duration of illness of their patients (8,21,26), and about one third did not indicate the duration of the follow-up period (8,24,69).…”