THE REDEVELOPMENT AND ENRICHMENT PROCEDURES USED TO INDUCE CHANGES IN THE LEARNING PROCESS OF ADOLESCENTS (AGES 12-15) WILL BE EVALUATED. THE EXTENT OF MODIFICATION AND THE BEST ENVIRONMENT FOR CHANGE ARE SECONDARY INTERESTS. INSTRUMENTAL ENRICHMENT, A CONSCIOUS RELEARNING OF LEARNING SETS, IS THE PROPOSED TECHNIQUE FOR ACHIEVING COGNITIVE REDEVELOPMENT. SOME DEGREE OF INDUCED REGRESSION WILL ACCOMPANY THIS METHOD TO ALLOW GRADUAL, NONTHREATENING LEARNING. TWO GROUPS WILL BE FORMED, EACH GROUP CONSISTING OF SUBGROUPS DIVIDED BY THE VARIABLES, "DEEPLY DEPRIVED" AND "SIGNIFICANTLY DEPRIVED." GROUP "A" WILL HAVE 150 STUDENTS LIVING IN A YOUTH VILLIAGE. GROUP "B" WILL HAVE 120 STUDENTS ATTENDING A DAY CENTER. IT IS HYPOTHESIZED THAT THE RESIDENTIAL SETTING WILL BE MORE EFFECTIVE IN RECONSTRUCTING THE IMPORTANT LIFE STAGES DURING WHICH THE COGNITIVE PROCESSES DISTORTED BY CULTURAL DEPRIVATION CAN BE RELEARNED. BOTH GROUPS WILL BE DIVIDED EQUALLY BY SEX AND PROPORTIONALLY BY THE AMOUNT OF INSTRUCTIONAL ENRICHMENT RECEIVED (ALL OR NONE). EACH GROUP WILL PARTICIPATE IN THE PROJECT FOR 2 YEARS AND WILL BE EVALUATED 2 YEARS AFTER THE PROGRAM'S COMPLETION. (NC)