MULTIPLE PEER USE OF PIVOTAL RESPONSE TRAINING TO INCREASE SOCIAL BEHAVIORS OF CLASSMATES WITH AUTISM: RESULTS FROM TRAINED AND UNTRAINED PEERS

Two children with autism and 8 typical peers participated in a study designed to replicate an earlier finding of successful social-skills intervention for children with autism using peer-implemented pivotal response training (PRT) and to assess the effects of using multiple peer trainers on generalization of treatment effects. During training, peers were taught PRT strategies using didactic instruction, modeling, role playing, and feedback. After treatment, children with autism engaged in increased levels of social behavior.     

Choice, matching, and human behavior: A review of the literature

This review concerns human performance on concurrent schedules of reinforcement. Studies indicate that humans match relative behavior to relative rate of reinforcement. Herrnstein's proportional matching equation describes human performance but most studies do not evaluate the equation at the individual level. Baum's generalized matching equation has received strong support with humans as subjects. This equation permits the investigation of sources of deviation from ideal matching and a few studies have suggested variables which control such deviations in humans. While problems with instructional control are raised, the overall findings support the matching law as a principle of human choice.     

Test-retest reliability of the Hurlbert Index of Sexual Assertiveness

This study investigated the test-retest stability of the Hurlbert Index of Sexual Assertiveness. 54 nonclinical and 46 clinical subjects were administered the Index on two occasions 4 wk. apart. Test-retest correlation coefficients were calculated separately and together. The results evidenced high test-retest reliability. Correlation coefficients were .88 for nonclinical subjects and .83 for clinical subjects with an over-all test-retest reliability of .85 for all 100 subjects.     

General and relationship-based perceptions of social support: are two constructs better than one?

Two hypotheses derived from a theory of perceived social support were investigated: (a) relationship-based perceptions of social support are distinct from general perceptions of support, and (b) measures of each construct contribute uniquely to the prediction of loneliness. Ninety-four male and 116 female undergraduates completed measures of loneliness and general perceived social support and the Quality of Relationships Inventory, a new instrument to assess relationship-based perceptions of social support, conflict, and depth in specific relationships. General and relationship-based perceptions of social support were found to be related, but empirically distinct, constructs. Relationship-based perceptions of support and conflict from mothers and friends each added to the prediction of loneliness after considering the contribution of general perceived social support. Implications of these findings for understanding the perceived social support construct are discussed.     

Hard-to-manage preschool boys: Family context and the stability of externalizing behavior

Preschool boys identified by their teachers as active, inattentive, and impulsive (N=42) were compared with matched classroom controls (N=43) and with parentidentified problem boys (N=27) on measures of family functioning often associated with children's problem behaviors, including family history of psychopalhology, stressful life events, and family composition. Teacher-identified and parent-identified problem boys did not differ on measures of family adversity, and both groups came from less well functioning families than comparison boys. Mothers of problem boys, regardless of referral source, were more negative and controlling toward their sons when observed in a compliance task. Children's problem behaviors were moderately stable over a oneyear follow-up period; initial symptom levels, maternal self-reported depression, and negative maternal control predicted follow-up ratings of externalizing problems.Thanks are expressed to Clea Angell, Clare Flanagan, Julie Hunt, Patricia Huszar, Andrea Lurier, Sarah McAuliffe, Jasmine Sardessai, and Teri Sobolik for help with data collection, coding, and analysis. We are grateful to the staff of the many preschools in the Pittsburgh area who facilitated our work. Special appreciation is expressed to the children and parents who participated in this study.Portions of these data were presented at the Rochester Symposium on Developmental Psychopathology, Rochester, New York, October 1988, and at the Society for Research in Child and Adolescent Psychopathology, Costa Mesa, California, February, 1990. This work was supported by grant R0I MH32735 from the National Institute of Mental Health to Dr. Campbell.     

On the short-term retention of serial,tactile stimuli

In three experiments using the short-term memory distractor paradigm, Ss attempted to remember which three or four phalanges of the left hand had been stimulated and in what order. The experiments showed that forgetting increased as a function of trials, that such proactive effects could be eliminated by separating the successive trials by several minutes, that both verbal and nonverbal distractor tasks impaired retention, and that forgetting reached a maximum in approximately 6 sec. All of these results concur with those generally obtained for the short-term retention of verbal material. In addition, it was shown that the tactile recall was significantly poorer after an arithmetic distractor task presented visually than after the same task presented aurally. This result suggests an overlap between the mechanisms of tactile retention and the mechanisms of vision.     

Short-term retention of tactile stimulation

In three experiments subjects were required to reproduce after varying delays the locus of a tactile stimulation delivered to the upper-side of the arm. During the retention periods subjects either performed a subsidiary, arithmetic task or rested. Recall, as measured by accuracy in reproducing the locus of stimulation, decreased as a function of retention interval, asymptoting after approximately 5 s. Performance was poorer in the subsidiary task condition than in the rest condition; however, the effect of the subsidiary task appeared to be more on subject recall strategies than on rehearsal capacity. No evidence of proactive interference effects was found, and a decay interpretation of forgetting of discrete tactile stimuli in the short-term memory distractor paradigm was favoured.     

STIMULUS FACTORS EFFECTING PEER CONVERSATION AMONG INSTITUTIONALIZED RETARDED WOMEN1

The effect of a series of stimulus changes, including attendant present or absent and agent of token reinforcement in a sorting task, on peer interaction among retarded women was examined. Conversation was not differentially directed toward the agent of reinforcement when that agent was a peer, nor did a peer agent increase the overall rate of peer interaction. Peer interaction did increase when no attendant was present, and during the final phase of the experiment, the high rate of peer interaction was maintained while the attendant was faded back into the situation in a series of discrete steps. The procedure was found to be efficient in terms of staff time and did not adversely affect task performance.     

Judge's Instruction on Eyewitness Testimony: Evaluation and Revision1

Studies of the reliability of eyewitness identification show that such testimony may frequently be inaccurate; because of this inherent unreliability, the law has established certain safeguards to the use of eyewitness evidence. One safeguard has been the development of an instruction that a judge may use to focus jurors' attention on the eyewitness issue. The effectiveness of this instruction has never been assessed, although other studies confirm that jurors frequently misunderstand or incorrectly use instructions they get from the judge. The purpose of these studies was to evaluate comprehension of this instruction in the context of a videotaped trial and to develop a simplified instruction that would be easier for jurors to understand. Compared to jurors who heard the existing instruction, those with the revised version were more knowledgeable of the factors to consider when listening to eyewitness testimony and were less likely to convict the defendant. A sample of superior court judges in the U.S. thought the simplified instruction was more effective than the existing version at conveying the intended legal concepts to the jury, but also rated it as more strongly biased toward the defense.