The comparative effectiveness of various psychiatric rehabilitation procedures on posthospital adjustment was surveyed using the outcome criteria of hospital recidivism and posthospital employment. The percentage of psychiatric patients who receive the traditional hospital regimen of drug treatment, and perhaps some form of individual or group therapy, and who are able to remain out of the hospital or find employment was established as a base line against which the unique effects of rehabilitation procedures could be evaluated. Several of the conclusions that evolved out of the survey are as follows: (a) Most all types of inpatient treatment innovations improve the patients' in-hospital behavior, but the research does not indicate that these approaches can singularly effect posthospital adjustment. ( 6) Ex-patients who attend aftercare clinics have a lower rate of recidivism than nonattenders. (c) Transitional facilities reduce recidivism but demonstrate little effect on enabling patients to function independently, as measured by posthospital employment, in the community, (d) There is a definite need for the continued use of specific outcome criteria so that the comparative effectiveness of various psychiatric rehabilitation procedures can be meaningfully evaluated.1 Requests for reprints should be sent to William

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300 one-day-old chicks were used in two experiments. Exp. I was designed to test an hypothesis that unequal retinal size is an insufficient cue for depth discrimination in a visual cliff Situation. One group of Ss was exposed to mirrors on deep and shallow sides which reflected only their image and a white ceiling. A second group was exposed to white patterns, and a third to stripe patterns equated for retinal size. No significant preferences were found. No conclusions were made regarding the cue of unequal retinal size. In Exp. 11, motion parallax was maximized by the use of three-dimensional patterns. One group was exposed to 3-D patterns equated for retinal size, a second to 2-D patterns unequated, and a third to 3-D patterns unequated. A significant preference for the shallow side was found only for the first group. Results of both experiments suggested chat the total size of the pattern areas was too small to permit consistent depth discrimination. Implications for studies attempting to define thresholds were discussed.