Does the "eyes lead the hand" principle apply to reach-to-grasp movements evoked by unexpected balance perturbations?

A fundamental principle that has emerged from studies of natural gaze behavior is that goal-directed arm movements are typically guided by a saccade to the target. In this study, we evaluated a hypothesis that this principle does not apply to rapid reach-to-grasp movements evoked by sudden unexpected balance perturbations. These perturbations involved forward translation of a large (2 × 6 m) motion platform configured to simulate a “real-life” environment. Subjects performed a common “daily-life” visuo-cognitive task (find a telephone and make a call) that required walking to the end of the platform, which was triggered to move as they approached a handrail mounted alongside the travel path. A deception was used to ensure that the perturbation was truly unexpected. Eleven of 18 healthy young-adult subjects (age 22-30) reached to grasp or touch the rail in response to the balance perturbation. In support of the hypothesis, none of these arm reactions was guided by concurrent visual fixation of the handrail. Seven of the 11 looked at the rail upon first entering the environment, and hence may have used “stored” central-field information about the handrail location to guide the subsequent arm reaction. However, the other four subjects never looked directly at the rail, indicating a complete reliance on peripheral vision. These findings add to previous evidence of distinctions in the CNS control of volitional and perturbation-evoked arm movements. Future studies will determine whether similar visuo-motor behavior occurs when the available handhold is smaller or when subjects are not engaged in a concurrent visuo-cognitive task.     

A particular resiliency to threatening environments

Being in the numerical minority can impair intellectual performance. We suggest, however, that these negative effects need not extend to everyone because some people—specifically high self-monitors—can overcome the effects of situationally activated stereotypes. In two studies, we manipulated the race/sex composition of small groups and assessed intellectual performance. Results revealed that: (a) self-monitoring moderated the effects of group-composition on performance, such that it was positively related to performance in stressful minority settings, (b) the number of out-group members in a group caused a linear effect on performance that differed for high and low self-monitors, and (c) stereotype activation mediated self-monitoring’s moderating effect on performance. Thus, high self-monitors may be resilient to threatening environments because they react to negative stereotypes with increased (and not decreased) performance. We discuss these results in relation to theories of inter-group contact, stereotype threat, and stress and coping.     

The Suitability of an Inhibitory Learning Approach in Exposure When Habituation Fails: A Clinical Application to Misophonia

Recent findings have led to a reconceptualization of the mechanisms that account for the efficacy of exposure-based treatments. Termed the “inhibitory learning model,” this approach emphasizes new learning when confronted with previously avoided stimuli rather than merely the cessation of fear or aversive emotional responding. In this paper, we propose the applicability of the inhibitory learning model for conditions and contexts in which simple exposure does not produce habituation. We illustrate this application from an in-progress randomized controlled treatment trial for adults with misophonia. Misophonia is a condition marked by strong aversive reactions to specific sounds. It is a difficult to treat and understudied syndrome. All participants in the trial received exposure, either before or after a stress management module of treatment. Exposure treatment emphasized altered expectancies for the target sounds as well as deliberate practice in hearing sounds on the individually developed hierarchy. Inhibitory learning strategies were employed to increase treatment adherence and commitment, shape patient behavior during exposures, manufacture negative prediction errors, increase perceived control over reactions, and promote learning that generalized to functional improvements. The findings are discussed in the context of future applications of the inhibitory learning model for psychopathology associated with avoidance.     

“Phobie à deux” and other reasons why clinicians do not apply exposure with response prevention in patients with obsessive–compulsive disorder

Meta-analyses suggest that exposure with response prevention (ERP) is the most efficacious treatment for obsessive–compulsive disorder (OCD) and treatment guidelines for the disorder accordingly recommend ERP. Despite this, many therapists, including those with a cognitive-behavioral therapeutic background, do not perform ERP in patients with OCD. The present study aimed to elucidate the reasons why. German therapists (N = 216) completed an anonymous online survey, the newly developed Reasons for Not Performing Exposure in OCD Scale (REPEX), that inquired whether, to what extent, and how they perform ERP in the treatment of OCD. We also asked their reasons for not applying ERP in the past. Most therapists considered ERP an efficient treatment for OCD. Marked differences emerged between physicians and psychologists, however. The former used exposure less often and for a shorter period, preferred in sensu to in vivo exposure, and conducted exposure less often in the personal environment of the patient than did psychologists. Both groups were familiar with clinical guidelines to a similar extent. A factor analysis of the REPEX scale revealed five factors. Patient lack of motivation, preference for exposure to be self-help as well as alleged organizational difficulties were endorsed most often. The latter was correlated with the age of the therapist and was far more often affirmed by physicians. Fear of side effects was named by a subgroup of clinicians; in the context of patient ambivalence, this may foster “phobie à deux”. Unlike prior research, lack of expertise was rarely identified as a reason not to use ERP. Recommendations for improving adherence to guidelines are discussed.     

Special series Subtypes of obsessive-compulsive disorder: Introduction

An accumulating body of research suggests that obsessive-compulsive disorder (OCD) is a heterogeneous condition, yet there is not yet a consensus on how best to conceptualize subtypes or dimensions of the disorder. This special series considers theoretical and practical issues pertaining to OCD subtypes. New possibilities for conceptualizing differences among OCD patients are considered, and avenues for treating different presentations of obsessions and compulsions are discussed. Treatment programs continue to be refined and outcome studies continue to demonstrate that tailoring cognitive-behavioral treatment toward specific presentations of OCD (e.g., contamination fears, severe obsessions) represents the future of OCD treatment. The articles in this special series are intended to further efforts to consider ways of better understanding the heterogeneity of OCD.     

Hierarchical structure of dysfunctional beliefs in obsessive-compulsive disorder

The Obsessive Beliefs Questionnaire was developed as a comprehensive measure of dysfunctional beliefs, which cognitive models consider to be etiologically related to obsessive-compulsive disorder. Obsessive Beliefs Questionnaire subscales tend to be highly correlated, which raises the question of whether obsessive-compulsive-related beliefs are hierarchically structured, consisting of lower-order factors loading on 1 or more higher-order factors. To investigate the nature and relative importance of these factors, a hierarchical factor analysis was conducted (n = 202 obsessive-compulsive disorder patients), using a Schmid-Leiman transformation. Results indicated a higher-order (general factor) and 3 lower-order factors: (i) responsibility and overestimation of threat, (ii) perfectionism and intolerance of uncertainty and (iii) importance and control of thoughts. The high-order factor accounted for more variance in Obsessive Beliefs Questionnaire scores (22%) than did the lower-order factors (6-7%), thereby underscoring the importance of the higher-order factor. Despite the importance of the higher-order factor, the lower-order factors significantly predicted unique variance in measures of obsessive-compulsive symptoms, including severity ratings of compulsions. These finding suggest that cognitive models of obsessive-compulsive disorder should take into consideration the hierarchic structure of obsessive-compulsive-related beliefs.     

A reexamination of black-white mean differences in work performance: more data, more moderators

This study is the largest meta-analysis to date of Black-White mean differences in work performance. The authors examined several moderators not addressed in previous research. Findings indicate that mean racial differences in performance favor Whites (d = 0.27). Effect sizes were most strongly moderated by criterion type and the cognitive loading of criteria, whereas data source and measurement level were influential moderators to a lesser extent. Greater mean differences were found for highly cognitively loaded criteria, data reported in unpublished sources, and for performance measures consisting of multiple item scales. On the basis of these findings, the authors hypothesize several potential determinants of mean racial differences in job performance.     

The Probability of Collective Choice with Shared Knowledge Structures

Complex decision making typically involves many agents attempting to aggregate many alternatives. If agents' preferences are unconstrained, cyclic outcomes are highly probable. In contrast, we show that if agents share similar models of the choice domain, then a stable collective outcome occurs with about 90% probability. These results have implications for systems of interacting agents, such as group decisions by individuals in social settings or interpretations of sense data by competing perceptual modules of a brain.     

Specificity of measures of thought control

The rebound effect (D. M. Wegner, 1994) essentially involves the persistence of thought when an effort has been made to suppress the cognitive activity. Some of the research in this area has been directed at determining personal factors that predict differential levels of rebound. To this end, measures of thought control have emerged. In the present study the authors examined the properties of 2 measures of thought control: the Thought Control Questionnaire (TCQ; A. Wells & M. I. Davies, 1994) and the White Bear Suppression Inventory (WBSI; D. M. Wegner & S. Zanakos, 1994). Each measure was examined in relation to measures of obsessive-compulsive symptoms and worry, as well as combined factorial structure. Scores generally indicated that items on the Worry and Punishment subscales of the TCQ were highly related to worry and obsessive-compulsive symptoms, whereas scores on the WBSI showed an association between Worry and 1 subscale (Slowness) of obsessive-compulsive symptoms. Results of a principal components analysis indicate that, in the aggregate, the items from the TCQ and WBSI form 2 factors: Dysfunctional and Functional Thought Control Strategies. From these data, it appears that the TCQ possesses greater potential to predict performance in rebound experiments and has greater clinical usefulness. Future research directions involving the TCQ are recommended.     

Suspensions and detentions in an urban,low-income school: punishment or reward?

Disciplinary records for 3rd through 8th grade students (n = 314) in an inner-city, public school were examined for one school year to assess students' variation in response to discipline. Rates of disciplinary referrals were compared for students who received no detentions or suspensions throughout the year (never group n = 117), students who received one or more detention or suspension in the fall but not in the spring (fall group n = 62), and students who received one or more detention or suspension in the fall and one or more detention or suspension in the spring (fall + spring group n = 75). Results indicated that during the fall, the fall group had nearly equivalent rates of referrals to the fall + spring group; however, the fall group exhibited significantly lower rates of referrals during winter and spring that were nearly equivalent to the never group, as would be expected for a punishment procedure. In contrast, the fall + spring group evidenced increases in referrals across the year, suggesting the possibility that detentions and suspensions were functioning as rewards for this group. The fall + spring group was rated by teachers and peers at mid-year as highly aggressive, lacking social skills, and high on hyperactivity, whereas the fall group and the never group were statistically equivalent on teacher and peer ratings. Implications for mental health programs for urban schools are discussed, especially the need for alternatives to detention and suspension for the subset of students who account for the majority of school discipline.