The effectiveness of drug treatment programs in reducing criminal behavior: a meta-analysis

The main aim of this paper is to assess the effectiveness of drug treatment programs in reducing criminal behavior. The research is based on a systematic review and meta-analysis of evaluations of drug treatment programs. The research investigated various drug treatment programs including methadone treatment, therapeutic communities, post-release supervision for drug-misusing offenders, and drug courts, and focused on drug treatment programs that were primarily concerned with heroin, crack and cocaine misuse. The main outcome variable analyzed was reoffending following treatment as measured by self-reports or official records. The study was based on a meta-analysis of 28 evaluations of drug treatment programs. The meta-analysis involved calculating individual effect sizes for each study and weighted mean effect sizes for groups of studies. The mean odds of offending following treatment were significantly lower among clients of the drug treatment programs than among the comparison groups. However, the results varied by type of program, type of evaluation methods used, and characteristics of clients.     

Task and sex modulate the brain response to emotional incongruity in Asian listeners

In order to recognize banter or sarcasm in social interactions, listeners must integrate verbal and vocal emotional expressions. Here, we investigated event-related potential correlates of this integration in Asian listeners. We presented emotional words spoken with congruous or incongruous emotional prosody. When listeners classified word meaning as positive or negative and ignored prosody, incongruous trials elicited a larger late positivity than congruous trials in women but not in men. Sex differences were absent when listeners evaluated the congruence between word meaning and emotional prosody. The similarity of these results to those obtained in Western listeners suggests that sex differences in emotional speech processing depend on attentional focus and may reflect culturally independent mechanisms.     

Olfactory imagery: A review

Olfactions unique cognitive architecture, the apparently inconsistent evidence favoring imagery, and its difficulty of evocation have led some to conclude that there is no capacity for olfactory imagery. Using three streams of evidence, we examine the validity of this claim. First, self-reports of olfactory imagery can resemble those obtained for actual perception. Second, imagining an odor can produce effects similar to actual perception. Third, olfactory perception and memory-based images can interact. A model of olfactory imagery is then presented that utilizes the same systems employed in actual perception, with similar constraints. This model is consistent with olfactions unique information-processing capacities and can account for previous experimental inconsistencies on the basis of difficulty of evocation, a consequence of unstable access to semantic information. In sum, the evidence presented here is favorable to the existence of an olfactory imagery capacity.     

The implications of linking the dynamic performance and turnover literatures

This article examines how the literatures of dynamic performance and the performance-turnover relationship inform each other. The nonrandom performance turnover relationship suggests that dynamic performance studies may be biased by their elimination of participants who do not remain for the entire study period. The authors demonstrated that the performance slopes of those who leave an organization differ from the performance slopes of those who remain. This finding suggests that studies of the performance-turnover relationship need to consider employee performance trends when predicting turnover. Replicating and extending the research of D. A. Harrison, M. Virick, and S. William (1996), the authors found that performance changes from the previous month and performance trends measured over a longer time period explained variance in voluntary turnover beyond current performance. Finally, the authors showed that performance trends interacted with current performance in the prediction of voluntary turnover.     

Motor imagery vividness and symptom severity in Parkinson's disease

Motor imagery (MI), the mental simulation of movement in the absence of overt motor output, has demonstrated potential as a technique to support rehabilitation of movement in neurological conditions such as Parkinson's disease (PD). Existing evidence suggests that MI is largely preserved in PD, but previous studies have typically examined global measures of MI and have not considered the potential impact of individual differences in symptom presentation on MI. The present study investigated the influence of severity of overall motor symptoms, bradykinesia and tremor on MI vividness scores in 44 individuals with mild to moderate idiopathic PD. Linear mixed effects modelling revealed that imagery modality and the severity of left side bradykinesia significantly influenced MI vividness ratings. Consistent with previous findings, participants rated visual motor imagery (VMI) to be more vivid than kinesthetic motor imagery (KMI). Greater severity of left side bradykinesia (but not right side bradykinesia) predicted increased vividness of KMI, while tremor severity and overall motor symptom severity did not predict vividness of MI. The specificity of the effect of bradykinesia to the left side may reflect greater premorbid vividness for the dominant (right) side or increased attention to more effortful movements on the left side of the body resulting in more vivid motor imagery.     

Judgments of moving and intending to move in a timed-response task

Summary Subjects performed a timed-response task in which they attempted to synchronize a rapid flexion of the index finger of their preferred hand with the last of a train of four regularly spaced acoustic clicks. The task was used to stabilize the execution time of a simple voluntary response in order to facilitate psychophysical judgments about the subjects' perception of having responded and of having intended to respond. In the first experiment, male subjects (N = 6) adjusted the appearance time of a reference stimulus (a brief percutaneous pulse to the responding finger) until it appeared to be simultaneous with their perception of having made the response. All subjects adjusted the reference stimulus to appear after response onset during the latter half of the force impulse. This finding suggests that the perception of having responded is based on peripheral feedback from the response. In the second experiment, male subjects (N = 6) performed the same motor task, but adjusted the time of the reference stimulus so that it appeared to be simultaneous with their intention to respond. Two subjects were not able to do the task successfully; the remaining four subjects adjusted the reference stimulus to appear from 101 to 145 ms before response onset. This finding suggests that the intention to respond is perceptually separable from the response itself and occurs at a measurable time before response onset.     

Peer facilitation of generalization in a preschool classroom

Two 5-year-old deviant preschoolers taught each other, as peer-tutors, to identify pictorial figures describing prepositional relationships. During training sessions monitored by the experimenter, the child in the peer-tutor role presented stimulus materials and provided consequences for the responses of the child in the tutee role. An assessment of generalization by each child to an academic classroom setting occurred each day. The data showed that the peer-tutor could facilitate generalization, when the tutee was probed in the peer-tutor's presence. However, it was found that the salience of the peer-tutor's presence was critical to this effect. In particular, when the peer presented the stimuli or offered occasional consequences for some correct responses, generalization was greatly enhanced.This research was supported in part by PHS Training Grant HD 00183, Research Grant MH 11739, and a Dissertation Fellowship from the University of Kansas. Appreciation is expressed to the classroom teachers, Scott Simmons, Janet Wedel, Sue Parker, and Tena McEachern, for their patience and cooperation in the implementation of these procedures, and to Merril Stokes, for her help and encouragement during this study.     

Effects of alcohol and frustration on experimental graffiti

This study aimed to examine effects between alcohol and frustration in regard to graffiti. Forty-two subjects, 21 men and 21 women were randomly assigned in equal numbers to each of the three experimental groups, namely a Control group, an Alcohol group, and an Alcohol+Frustration group (alcohol dose: 1 ml 100% alcohol/kg body weight). For the purposes of this experiment, a test (AET) was constructed that provided scores of "scrawling-graffiti" (i.e., the amount of scrawling on pictures), "destruction", "aggression", and "sexuality". An elaboration test and a test measuring the "dispositional optimism" were also applied. The primary results indicated that (a) the Alcohol+Frustration group scored significantly higher on scrawling-graffiti compared to the Control group, (b) female subjects performed graffiti-scrawling to a greater extent than male subjects in all three groups, (c) women scored significantly higher on elaboration as compared to men. These results were interpreted as supporting the hypothesis that alcohol intake by itself is unlikely to induce destructive behavior unless accompanied by a "provocative" factor (e.g. frustration) that precipitates the putative expressions of aggressiveness.     

En Route to Depression: Self‐Esteem Discrepancies and Habitual Rumination

Dual‐process models of cognitive vulnerability to depression suggest that some individuals possess discrepant implicit and explicit self‐views, such as high explicit and low implicit self‐esteem (fragile self‐esteem) or low explicit and high implicit self‐esteem (damaged self‐esteem). This study investigated whether individuals with discrepant self‐esteem may employ depressive rumination in an effort to reduce discrepancy‐related dissonance, and whether the relationship between self‐esteem discrepancy and future depressive symptoms varies as a function of rumination tendencies. Hierarchical regressions examined whether self‐esteem discrepancy was associated with rumination in an Australian undergraduate sample at Time 1 (N = 306; M_age = 29.9), and whether rumination tendencies moderated the relationship between self‐esteem discrepancy and depressive symptoms assessed 3 months later (n = 160). Damaged self‐esteem was associated with rumination at Time 1. As hypothesized, rumination moderated the relationship between self‐esteem discrepancy and depressive symptoms at Time 2, where fragile self‐esteem and high rumination tendencies at Time 1 predicted the highest levels of subsequent dysphoria. Results are consistent with dual‐process propositions that (a) explicit self‐regulation strategies may be triggered when explicit and implicit self‐beliefs are incongruent, and (b) rumination may increase the likelihood of depression by expending cognitive resources and/or amplifying negative implicit biases.