Visual and haptic feedback contribute to tuning and online control during object manipulation

The authors employed a virtual environment to investigate how humans use haptic and visual feedback in a simple, rhythmic object-manipulation task. The authors hypothesized that feedback would help participants identify the appropriate resonant frequency and perform online control adjustments. The 1st test was whether sensory feedback is needed at all; the 2nd was whether the motor system combines visual and haptic feedback to improve performance. Task performance was quantified in terms of work performed on the virtual inertia, ability to identify the correct rhythm, and variability of movement. Strict feedforward control was found to be ineffective for this task, even when participants had previous knowledge of the rhythm. Participants (N = 11) performed far better when feedback was available (11 times more work, 2.2 times more precise frequency, 30% less variability; p < .05 for all 3 performance measures). Using sensory feedback, participants were able to rapidly identify 4 different spring-inertia systems without foreknowledge of the corresponding resonant frequencies. They performed over 20% more work with 24% less variability when provided with both visual and haptic feedback than they did with either feedback channel alone (p < .05), providing evidence that they integrated online sensory channels. Whereas feedforward control alone led to poor performance, feedback control led to fast tuning or calibration of control according to the resonant frequency of the object, and to better control of the rhythmic movement itself.     

Empathic accuracy of intimate partners in violent versus nonviolent relationships

This study compared the empathic accuracy of men and women who had perpetrated physical intimate partner violence with that of partners in nonviolent but distressed and nonviolent and nondistressed relationships. Examined was the empathic accuracy (a) of partners for one another’s thoughts and feelings during a relationship problem discussion in the laboratory, (b) of partners’ empathic accuracy for each other with the empathic accuracy of objective observers who watched the couples’ interactions, and (c) the males’ empathic accuracy for their female partner to their empathic accuracy for female strangers. No significant group differences were found among women’s empathic accuracy, but the data suggest that violent men exhibit poor empathic accuracy when attempting to understand their female partner’s thoughts and feelings.     

Self‐regulation of Group Members: The Case of Regulatory Focus

For a long time, research on motivation and (inter)group behaviour mainly focused on needs and motives, but did not take self‐regulation (i.e., the processes underlying motivated action) into account. Similarly, self‐regulation research concentrated on the regulation of the personal self, but did not study the regulation of the social self. The current article summarizes work applying self‐regulation approaches to intergroup behaviour. Within this approach, it has been shown (a) that the social self is regulated based on the same mechanisms as the personal self, (b) that intergroup contexts impact on group members’ self‐regulation strategies, and (c) that the fit between an individual's self‐regulation strategy and the behavioural options provided by the group impact on group liking and potentially also on the integration of the group into the self‐concept. The relation between current and earlier approaches to motivation in groups and further avenues for research on group‐based self‐regulation are discussed.     

Executive disorders and perceived socio‐emotional changes after traumatic brain injury

Although socio‐emotional changes are very frequently encountered after traumatic brain injury (TBI), the psychological mechanisms underlying these disorders are still poorly understood. This study aimed to explore the relationships between dysexecutive syndrome (assessed with the Behavioural Assessment of the Dysexecutive Syndrome [BADS]) and socio‐emotional changes assessed by the Iowa scales of personality change (ISPC) in patients with TBI. The BADS was thus administered to 25 patients with TBI and to 25 healthy controls. Simultaneously, a close relative of each patient was given the ISPC in order to assess socio‐emotional changes. Results indicated that patients displayed significantly lower executive performances than controls and experimented significant socio‐emotional changes. The Modified Six Elements Test was the only subtask of the BADS to be significantly related to behavioural changes, and more specifically to externalizing disorders. It is concluded that executive functions, and especially multitasking, encompass processes whereby one can consciously control one's emotional reactions and behaviours.     

Lack of strategy holding: A new pattern of learning deficit in cortical dementias

The aim of this study was to demonstrate, by means of systematic research and qualitative data analysis, the presence, among a group of patients with fronto‐temporal lobar degeneration of a subgroup that, at variance with the standard pattern, is able to devise and implement learning strategies, but appear impaired at carrying them on from a trial to the next. In order to provide evidence of the existence of a group of patients showing this type of learning disability, that we refer to as lack of strategy holding, we performed a stepwise hierarchical cluster analysis of a set of variables whose scores were selected from the subject's performance at the Test de Aprendizaje Verbal España‐Complutense. Results substantiate the segregation of three groups of subjects characterized by the following patterns of performance: normal elderly individuals, who show a quite preserved ability to discover a semantic strategy along the learning trials and to carry it from a trial to the next, patients presenting with a deficit in implementing semantic learning strategies and possibly use of serial and/or phonological strategies to perform the task, and to patients who, although able to generate and implement appropriate learning strategies, appear unable to carry them over the learning trials. The presence of this new pattern raises a few questions that seem worth trying to address.     

任务切换机制研究的理论争议与整合

任务切换是执行控制的一种重要功能。切换代价是量化执行控制持续时间的指标。并广泛应用于各个研究领域。但是切换代价在多大程度上体现了执行控制的作用,仍然还存在争论．当前主要存在任务设置重构、任务设置惯性和联结竞争三种理论。本文首先介绍了三种理论的基本观点和实验证据,以及对任务切换加工机制的分析;其次阐明了对三种理论进行整合的相关研究;最后分析了进一步研究的方向。     

The Relationships Between Mexican American Acculturation,Cultural Values,Gender, and Help‐Seeking Intentions

This study examined the relationships between Mexican acculturation, cultural values, gender, and help‐seeking intentions among Mexican American community college students. Findings suggest that as Mexican Americans lose their culture of origin and increase their generational status, their attitudes toward help seeking become less favorable. This contradicts cultural barrier theory as an explanation for underuse of mental health services by Mexican Americans. Furthermore, adherence to traditional Mexican culture and cultural values may actually encourage help seeking.     

Identifying Substance Abuse Issues in High Schools: A National Survey of High School Counselors

High school students consistently report the use of substances such as alcohol, cigarettes, and marijuana. One of the people they would talk to about a substance use problem is their school counselor. A survey study was conducted with a national sample of 289 high school counselors. Results indicated that participants were clearly able to identify their practice limitations and future training needs in this area. Implications for training and recommendations for future research are discussed.     

Age differences in learning from text: Evidence for functionally distinct text processing systems

We investigated the influence of sentence elaboration on self‐regulated learning in order to examine age differences in resource allocation to the construction of textbase‐ and discourse‐level representations. Older and younger adults learned about a topic by reading a series of sentences varying in elaboration (from simple factoids to highly elaborated text) and manner of presentation (progressive change in elaboration vs. random change in elaboration). Younger readers were more likely to recall information from factoids; older adults, from highly elaborated text. Relative to young, older readers showed an advantage in the progressive presentation condition, which minimised frequent changes between textbase‐ and discourse‐level processing. Older adults showed poorer memory monitoring for factoids and less elaborated discourse relative to young, but when passages were highly elaborated or presented progressively, age differences were eliminated. Results support the idea that textbase‐ and discourse‐level encoding arise from functionally distinct systems whose regulation depends on text properties and reader age. Copyright © 2008 John Wiley & Sons, Ltd.