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Administration, who assumes no responsibility for the opinions expressed or the conclusions drawn by the author. Based on a dissertation submitted to the University of California, Los Angeles, in partial fulfillment of the requirements for the degree of Doctor of Philosophy. The writer gratefully acknowledges his indebtedness to the committee who supervised his research.

173 CONCLUSIONS(1) Extensive study of CPM performance in chronic schizophrenics reveals no significant consistent effects of sub-shock insulin. However, this drug increases interpatient variability; and with its removal there is a slight improvement in performance.(2) When the capacity of chronic schizophrenics for CPMs is measured in terms of consistency of performance it is markedly inferior to normal groups. However, when capacity is considered from a power viewpoint, regardless of consistency, the patients are found to be very heterogeneous.(3) There is a maze threading faculty which is general to mazes requiring different perceptual-motor operations.(4) There is a positive relationship between CPM ability and hospital adjustment in chronic schizophrenics. REFERENCES 1. PETERS, H. N. Multiple choice learning in the chronic schizophrenic. J . din. Psychol., 1953, 9, 328-333. 2. PETERS, H. N., and JENKINS, R. L. Improvement of chronic schizophrenic patients with guided problem solving motivated by hunger.