The relationship between physical and sexual abuse and tobacco, alcohol, and illicit drug use among youths in a juvenile detention center.

The relationships between child physical and sexual abuse and tobacco, alcohol, and illicit drug use are little understood and underinvestigated. Data gathered from a study of youths in a regional detention center permitted an examination of this issue. The results indicate that the youths' physical and sexual abuse experiences are significantly and positively related to their use of illicit drugs. The implications of these findings for further research are drawn.

Physical abuse, sexual victimization and illicit drug use: a structural analysis among high risk adolescents.

The relationships between child physical and sexual abuse and illicit drug use are relatively unexplored and obscure. Data gathered from a sample of youths in a juvenile detention center permitted an examination of this important issue. A structural model, specifying the influence of child physical and sexual abuse variables on the youths' illicit drug use, directly and as mediated by self-derogation, was estimated among male and female detainees. Results suggest that for both gender groups, sexual victimization had a primarily direct effect on drug use, whereas physical abuse had both a direct and an indirect effect on drug use. The indirect effect of physical abuse on drug use was mediated by self-derogation. Further analysis indicated race did not affect the results. The implications of these results for theory and research on the etiology of drug use and the identification of youths in high risk groups who are likely to become seriously involved in drug use are discussed.

Obedience as a function of experimenter competence.

The purpose of this study was to investigate obedience to an E's commands as a function of E competency. Based upon Orne's (1962, 1969) discussion of the demand characteristics inherent in the typical aggression study, it was hypothesized that E incompetence would decrease S obedience. Competence was manipulated by: (1) presenting some Ss with a nervous and inexperienced E, and (2)"accidentally" killing the victim (a rat) midway through the experiment. Thirty-two undergraduate female Ss participated in the experiment-supposedly a study on the physiological effects of stress. Obedi6nce was operationalized as the difference, in simple reaction time, between trials on which Ss were told that their response might result in shock to the rat and trials on which they were told that their response might save the rat from shock. Significant differences in obedience were obtained between competent and incompetent E conditions, and a significant "kill" effect was found in the competent E conditidn. The results of this study suggested that the extreme acts of obedience observed in the laboratory (e.g., Milgram, 1963) occur only when E is perceived as competent. This finding imposes limits on the generalizability of laboratory studies of obedience.

Discriminative and reinforcing properties of two types of food pellets.

In Experiment I some discriminative functions of food pellets were studied by developing a multiple schedule of reinforcement (mult FR 30 FI 3) in which the delivery of a standard laboratory food pellet as a reinforcer set the occasion for reinforcement on every 30th response (FR 30), and the delivery of a sucrose food pellet as a reinforcer set the occasion for reinforcement after a 3-min interval (FI 3). Discriminative stimulus control by the type of pellet was also demonstrated by reversing the operant discrimination and having the standard pellet control the FI 3 and the sucrose pellet control the FR 30. In Experiment II a mult FR 30 FR 30 with two bars was developed; a standard food pellet was followed by an FR 30 on Bar 1 and extinction (ext) on Bar 2, while a sucrose pellet was followed by an FR 30 on Bar 2 and ext on Bar 1. A control rat was placed, for comparison, on a mixed (mix) FR 30 FR 30 schedule with two bars, but neither bar correlated with the type of food pellet. In Experiments I and II the similarity between pellet controlled multiple schedules and multiple primed schedules was discussed, as was the comparability of transitions and effectiveness of control between pellet controlled multiple schedules and multiple schedules providing continuous exteroceptive stimuli.