Motor imagery in spinal cord injured people is modulated by somatotopic coding,perspective taking,and post‐lesional chronic pain

Motor imagery (MI) allows one to mentally represent an action without necessarily performing it. Importantly, however, MI is profoundly influenced by the ability to actually execute actions, as demonstrated by the impairment of this ability as a consequence of lesions in motor cortices, limb amputations, movement limiting chronic pain, and spinal cord injury. Understanding MI and its deficits in patients with motor limitations is fundamentally important as development of some brain–computer interfaces and daily life strategies for coping with motor disorders are based on this ability. We explored MI in a large sample of patients with spinal cord injury (SCI) using a comprehensive battery of questionnaires to assess the ability to imagine actions from a first‐person or a third‐person perspective and also imagine the proprioceptive components of actions. Moreover, we correlated MI skills with personality measures and clinical variables such as the level and completeness of the lesion and the presence of chronic pain. We found that the MI deficits (1) concerned the body parts affected by deafferentation and deefferentation, (2) were present in first‐ but not in third‐person perspectives, and (3) were more altered in the presence of chronic pain. MI is thus closely related to bodily perceptions and representations. Every attempt to devise tools and trainings aimed at improving autonomy needs to consider the cognitive changes due to the body–brain disconnection.     

Peer Influence in Elementary School: The Importance of Assessing the Likeability of Popular Children

Abstract

We examined the degree to which children perceive influence behaviors and influence over social norms from different types of high-status children to vary in a sample of 453 3^rd through 5^th grade children. Using a cluster analysis of peer-nominated popularity and likeability measures, we identified a seven-cluster solution, including three high-status clusters: Well-Liked, Popular, and Popular/Well-Liked. Popular children were perceived as using ridicule and having influence over misbehavior. Popular/Well-Liked children were perceived as using playful teasing and modeling and influencing over trend-setting and sports norms, at a degree similar to Popular children. However, Popular/Well-Liked children were not perceived as using ridicule or influencing over misbehavior; rather, they scored higher than all other status groups for prosocial assertion and academic motivation. Well-Liked children were perceived as using prosocial assertion and influencing over academic motivation at a higher degree than Average children but at a lower degree than Popular or Popular/Well-Liked children. Although the influence associated with likeability alone appeared relatively limited, likeability in conjunction with popularity seems to make a difference regarding influence behaviors and norms. A person-centered approach that takes into account multiple facets of social status is likely to enhance understanding of high-status children’s influence on their same-age peers.     

The who and when of internal gender discrimination claims: An interactional model

Although gender discrimination has been illegal in organizations since the passage of the Civil Right Act of 1964, individuals remain hesitant to claim internally by making members of their employing organization aware of gender discrimination. Yet surprisingly little research has examined the individual difference and contextual antecedents to internal discrimination claims. We advance an interactional model and hypothesize that gender identity (GI) and climate for diversity (CFD) will interact to predict internal claims of gender discrimination. Consistent with theory, laboratory and field studies demonstrate that strong GI individuals are more likely to make internal claims in organizations that value inclusion (i.e., positive CFD) than in organizations where discrimination is pervasive (i.e., negative CFD). In contrast to strong GI individuals, however, weak GI individuals are more likely to claim in a negative CFD than in a positive CFD. Implications for both individuals and organizations are discussed.     

Supervisor Appraisal as the Link Between Family–Work Balance and Contextual Performance

We examined the relationship between subordinates’ family to work balance (conflict and enrichment) and two dimensions of contextual performance (interpersonal facilitation and job dedication) reported by supervisors. Beyond the direct effects, we hypothesized that supervisor’s appraisals of employee conflict and enrichment would influence the supervisor’s contextual performance ratings. Data collected from a matched sample of 156 private sector employees and their supervisors indicated that the supervisor’s performance ratings were impacted by the supervisor’s appraisal of enrichment. However, the supervisor’s appraisal of conflict only mattered for interpersonal facilitation. There was a direct effect of subordinate’s conflict on both dimensions of contextual performance.     

Assessing potency of high- and low-preference reinforcers with respect to response rate and response patterns

Previous research has suggested that the availability of high-preference stimuli may override the reinforcing efficacy of concurrently available low-preference stimuli under relatively low schedule requirements (e.g., fixed-ratio 1 schedule). It is unknown if similar effects would be obtained under higher schedule requirements. Thus, the current study compared high-preference and low-preference reinforcers under progressively increasing schedule requirements. Results for 3 of the 4 participants indicated that high-preference stimuli maintained responding under higher schedule requirements relative to low-preference stimuli. For 1 participant, high-preference and low-preference stimuli were demonstrated to be equally effective reinforcers under increasing schedule requirements. Implications with respect to rate of performance and response patterns are discussed.     

On the nature of nonverbal working memory fractionation: a case of selective spatial short-term memory deficit in a child

Several lines of research on adult subjects demonstrate a visual/spatial fractionation of nonverbal working memory (WM), while behavioral studies on normal children support the idea of a static/dynamic distinction. In the present paper, we report a child (Z.M.) who failed on nonverbal WM tasks. To verify the nature of his defect, we carried out two experiments: in Experiment 1, Z.M. failed on spatial WM tasks but not on visual WM tasks and was not affected by the static/dynamic format of stimulus presentation; in Experiment 2, this visual/spatial dissociation was extended to the imagery domain. These results are best accounted for within the visual/spatial fractionation of WM and confirmed the role of WM in mental imagery. Clinical and rehabilitative implications of the present findings are also discussed.     

Decreasing scoring errors on Wechsler Scale Vocabulary, Comprehension, and Similarities subtests: a preliminary study

Studies of graduate students learning to administer the Wechsler scales have generally shown that training is not associated with the development of scoring proficiency. Many studies report on the reduction of aggregated administration and scoring errors, a strategy that does not highlight the reduction of errors on subtests identified as most prone to error. This study evaluated the development of scoring proficiency specifically on the Wechsler (WISC-IV and WAIS-III) Vocabulary, Comprehension, and Similarities subtests during training by comparing a set of 'early test administrations' to 'later test administrations.' Twelve graduate students enrolled in an intelligence-testing course participated in the study. Scoring errors (e.g., incorrect point assignment) were evaluated on the students' actual practice administration test protocols. Errors on all three subtests declined significantly when scoring errors on 'early' sets of Wechsler scales were compared to those made on 'later' sets. However, correcting these subtest scoring errors did not cause significant changes in subtest scaled scores. Implications for clinical instruction and future research are discussed.     

Spatial language influences memory for spatial scenes

Does language influence recognition for spatial scenes? In Experiments 1 and 2, participants viewed ambiguous pictures, with or without spatial sentences. In a yes—no recognition task, only the spatial sentences group made more false alarms toward the center of the spatial category than in the other direction; three other comparison groups showed no such tendency. This shift toward the core of the semantic category suggests that spatial language interacted with perceptual information during encoding. In Experiment 3, we varied the materials to test the interactive encoding account against a separate encoding account in which separately stored sentences are accessed during picture recognition. The results support the interactive encoding account in which spatial language influences the encoding and memory of spatial relations.     

Executive Inhibitory Control and Cooperative Behavior During Early School Years: A Follow-Up Study

Several links between aspects of executive functioning and the development of social competence have been established. The present study investigates the relation between executive inhibitory control and cooperative/non-cooperative behavior, in an ecological setting, and from a longitudinal perspective. Elementary school children (n=195) of three age groups (7, 9, 11 years, initially) were measured at two consecutive time points, at a one-year interval, with tasks tapping executive inhibitory control (the Stroop test), and social competence (a collaborative puzzle solving task). Executive inhibition was identified as the most influential stable predictor only in the case of non-cooperative behavior and presented strong concurrent relations with both cooperative and non-cooperative behavior at follow-up, even when controlling for previous level of the same behavior. The findings imply the need to consider the important role of executive inhibitory processes in multifactorial models of social competence development and in the refinement of present interventions.     

When the customer shouldn't be king: antecedents and consequences of sexual harassment by clients and customers

Much of the work in today's service industries requires women to deal with people outside of their organizations, namely, customers and clients, yet research on sexual harassment has focused almost exclusively on sexual harassment within organizations. Because the threat of harassment also operates at the boundaries of organizations, our existing models based solely on harassment inside organizations may be too restricted to adequately explain the harassment experiences of women in today's economy. To address this, the authors introduce a theoretical model of the antecedents and consequences of sexual harassment by clients and customers (CSH) and describe 2 field studies conducted to test components of the model. In Study 1, they developed a model of antecedents and consequences of CSH and illustrated that certain contextual factors (client power and gender composition of the client base) affect levels of CSH and that CSH is related to a number of job and psychological outcomes among professional women. Study 2 revealed that CSH is related to lower job satisfaction among nonprofessional women, above and beyond that which is accounted for by internal sexual harassment. Theoretical and practical implications are discussed.