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161.
Sanger TD 《Journal of motor behavior》2010,42(6):401-407
In human motor control, there is uncertainty in both estimation of initial sensory state and prediction of the outcome of motor commands. With practice, increasing precision can often be achieved, but such precision incurs costs in time, effort, and neural resources. Therefore, motor planning must account for variability, uncertainty, and noise, not just at the endpoint of movement but throughout the movement. The author presents a mathematical basis for understanding the time course of uncertainty during movement. He shows that it is possible to achieve accurate control of the endpoint of a movement even with highly inaccurate and variable controllers. The results provide a first step toward a theory of optimal control for variable, uncertain, and noisy systems that must nevertheless accomplish real-world tasks reliably. 相似文献
162.
Cognitive behavior therapy (CBT) is an effective treatment for bulimia nervosa (BN). However, among patients with BN, symptom improvement is more pronounced for behavioral eating symptoms (i.e., bingeing and purging) than for body image disturbance, and the persistence of body image disturbance is associated with relapse. The need for more effective body image interventions led to the development of mirror exposure, which focuses on encouraging patients to view themselves in a holistic, nonjudgmental, mindful fashion. Behavioral manifestations of body image disturbance—body checking and avoidance—are also targeted in order to reduce and eliminate such behaviors and their associated preoccupation and distress. A preliminary trial of Body Image Exposure has shown promise, but it has not yet been tested in the context of CBT for BN. The case of “Sara” illustrates the application of this targeted treatment for body image disturbance. Central clinical issues around the perceptual, cognitive, and behavioral components of body image are delineated as they arose in treatment, as are issues of motivation and compliance. Treatment was associated with improvement in eating symptoms, body image, and mood. 相似文献
163.
The focus of this study was on revising the Inventory of Children's Activities–Revised (ICA-R; Tracey & Ward, 1998) to enhance its psychometric properties while minimizing gender differences in scale scores. The original 30 ICA-R items and an additional 30 items were administered to 70,280 fifth-eighth grades students. The original scoring was compared to a revised scoring method based solely on the empirically best items and a scoring method balancing empirical scoring with minimizing gender differences. All three item sets (original, empirical, and combined empirical/gender balancing) resulted in strong internal consistency estimates and adequate fit to the circular structure, yet the combined empirical/gender method had much lower gender differences especially for the scales measuring Investigative and Social interests. The implications of using the revised scale with children is discussed. 相似文献
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Ruth M. Anan Lori J. Warner Jamie E. McGillivary Ivy M. Chong Stefani J. Hines 《Behavioral Interventions》2008,23(3):165-180
Early, intensive behavioral intervention is effective in treating children with autism spectrum disorders (ASDs), but can be cost prohibitive. Expenses may be defrayed if children can benefit from parents acting as therapists. This quantitative case series examines the efficacy of the Group Intensive Family Training (GIFT) program, a 12‐week (180 h, delivered 3 h each weekday) parent‐training for preschoolers with ASDs. Parents were individually mentored in the hands‐on application of behavior analytic techniques, implementing these skills in vivo within a group of six parent–child dyads. Seventy‐two parents and children (ages 25–68 months) with ASDs participated in this study. Children's cognitive and adaptive functioning was assessed before and after the intervention program. Analyses revealed average gains of eight standard score points on the Mullen Early Learning Composite and five standard score points on the Vineland Adaptive Behavior Composite after 12 weeks of treatment. Additionally, 14% and 11% of the children moved from the ‘impaired’ to ‘non‐impaired’ range on Mullen and Vineland composite scores, respectively. This preliminary investigation suggests that GIFT's behavioral, group parent‐training can lead to significant, yet cost‐ and time‐efficient gains for children with ASDs. Results must be interpreted with caution because of the absence of a control group. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
167.
David F. Tolin Nicholas Maltby Frank W. Weathers Brett T. Litz Jeffrey Knight Terence M. Keane 《Journal of psychopathology and behavioral assessment》2004,26(1):23-29
This study evaluated the use of the FP (Infrequency–Psychopathology) scale of the Minnesota Multiphasic Personality Inventory—2 (MMPI-2) as a measure of symptom overreporting among 423 service-seeking male veterans with and without PTSD. Results were consistent with several predictions based on the logic of the FP scale. FP produced lower scores for PTSD and non-PTSD patients than the other two MMPI-2 measures of infrequent responding; F and FB. FP also resulted in fewer invalid protocols than did F or FB. Finally, FP yielded lower correlations with MMPI-2 and other measures of psychopathology than did F or FB. Consistent with previous studies, compensation-seeking status was associated with extreme elevations across clinical and validity scales. Contrary to previous findings, however, compensation-seeking veterans were also more likely to receive a PTSD diagnosis. Implications for the relationship between compensation seeking and symptom overreporting are discussed. 相似文献
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Terence P. Thornberry Hyman Hops Rand D. Conger Deborah M. Capaldi 《Journal of abnormal child psychology》2003,31(2):201-203
This commentary summarizes findings from four papers that set out to replicate, albeit not with identical measures or sampling criteria, research on several questions in the multigenerational study of antisocial behavior by children and child-rearing strategies by parents. The weight of the evidence from our studies indicates some degree of intergenerational continuity in behavior. We observed that adjacent generations G1 and G2 are similar with respect to their styles of parenting and that adjacent generations G2 and G3 are similar with respect to antisocial behavior. In addition, the G2 parent's parenting style plays an important role in mediating or transferring the risk of antisocial behavior across the generations. Implications and directions for future research are discussed. 相似文献
170.
Daryl R. Smith Brooks C. Holtom Terence R. Mitchell 《Journal of Vocational Behavior》2011,79(1):290-302
The present research examines the differential validity of the facets of organizational commitment and job embeddedness to predict who will reenlist or retire from a branch of the armed services. We tested hypotheses with survey data from 1839 enlisted personnel in the U.S. Air Force. For personnel facing the decision to reenlist or separate, continuance commitment and organizational job embeddedness predicted reenlistment. For those eligible to retire, affective and normative commitment as well as organizational job embeddedness predicted who would reenlist rather than retire. However, unlike previous studies, for both criteria (reenlistment and retirement), people who were more embedded in their communities were more likely to voluntarily leave. This finding identifies an important boundary condition for job embeddedness theory. 相似文献