Using 1968 data collected from junior and senior high school students in Bayamon, Puerto Rico, substance usage patterns for heroin and alcohol were predicted for 1975-6. A sample of 1,000 of the initial 5,000 students were selected for re-interview; half were selected to be at high risk of substance abuse and half were selected randomly. Some 657…

Experimental measures to identify individuals at high risk of drug use can be developed from study data. Negative side effects of identification efforts can be lessened or eliminated by the use of unobstrusive measures in the monitoring process. Regarding heroin use, different measures are suggested to monitor the following variables: academic…

A longitudinal study of educational variables and drug use was conducted by interview with 635 young Puerto Rican adults. Half had been selected as representing a "high risk" population, half a "normal risk" population. Correlational analyses revealed that the use of all drugs was associated with a negative attitude toward…