Using the movement-related cortical potential to study motor skill learning

The movement-related cortical potential (MRCP) is a low-frequency negative shift in the electroencephalographic recording that occurs about 2 s before voluntary movement production. The MRCP is thought to reflect the cortical processes involved in movement planning and movement preparation. In recent years, researchers have used this potential to investigate the processes involved in motor skill learning. Their findings indicate differences in the amplitude and onset times of the MRCP between experienced and novice performers, which have been attributed to long-term training in the experts. The authors discuss these findings critically and consider their implications for both future research and practice.     

A Sequential Examination of Parent–Child Interactions at Anesthetic Induction

Parental presence is often employed to alleviate distress in children within the context of surgery under general anesthesia. The critical component of this intervention may not be the presence of the parent per se, but more importantly the behaviors in which the parent and child engage when the parent is present. The purpose of the current study was to examine the sequential and reciprocal relationships between parental behaviors and child distress during induction of general anesthesia. Participants were 32 children (3–6 years) receiving dental surgery as a day surgery procedure, and their parents. A modified Child Adult Medical Procedures Interaction Scale-Revised was used to code parent and child behaviors. Initial child distress led to increased parental provision of reassurance and decreased provision of physical comfort. Our findings may inform the development of preoperative preparation programs whereby parents can be appropriately educated about what behaviors will be helpful/unhelpful for their child during induction of general anesthesia.     

Weak ventral striatal responses to monetary outcomes predict an unwillingness to resist cigarette smoking

As a group, cigarette smokers exhibit blunted subjective, behavioral, and neurobiological responses to nondrug incentives and rewards, relative to nonsmokers. Findings from recent studies suggest, however, that there are large individual differences in the devaluation of nondrug rewards among smokers. Moreover, this variability appears to have significant clinical implications, since reduced sensitivity to nondrug rewards is associated with poorer smoking cessation outcomes. Currently, little is known about the neurobiological mechanisms that underlie these individual differences in the responsiveness to nondrug rewards. Here, we tested the hypothesis that individual variability in reward devaluation among smokers is linked to the functioning of the striatum. Specifically, functional magnetic resonance imaging was used to examine variability in the neural response to monetary outcomes in nicotine-deprived smokers anticipating an opportunity to smoke—circumstances found to heighten the devaluation of nondrug rewards by smokers in prior work. We also investigated whether individual differences in reward-related brain activity in those expecting to have access to cigarettes were associated with the degree to which the same individuals subsequently were willing to resist smoking in order to earn additional money. Our key finding was that deprived smokers who exhibited the weakest response to rewards (i.e., monetary gains) in the ventral striatum were least willing to refrain from smoking for monetary reinforcement. These results provide evidence that outcome-related signals in the ventral striatum serve as a marker for clinically meaningful individual differences in reward-motivated behavior among nicotine-deprived smokers.     

Repeated Play Reduces Video Games’ Ability to Elicit Guilt: Evidence from a Longitudinal Experiment

Statements supported mostly by correlational and cross-sectional studies suggest that playing violent video games can cause emotional desensitization. A longitudinal experiment examined a) whether repeated violent game play leads to emotional desensitization and b) whether desensitization generalizes to other play and real-life experiences. Participants played alternative versions of the same violent game for the first four days; on these days, the character role was varied between-subjects to be moral (United Nations soldier) or immoral (terrorist soldier). On Day 5, all participants played a novel game as a terrorist. Results indicate two things. First, habituation occurs over repeated game play: Repeated exposure decreased the ability of the original game to elicit guilt. Second, the decreased ability to elicit guilt can generalize to other game-play experiences: Guilt elicited by the novel game on Day 5 was reduced for the immoral character condition compared to the moral character condition. The current study provides causal, longitudinal evidence regarding the potential for video game play to lead to emotional desensitization with regard to future video game-play experiences.     

Combined effects of workplace bullying and perceived organizational support on employee behaviors: does resource availability help?

Background and Objective: This research examines the detrimental effects of workplace bullying as a social stressor on employees’ job performance, organizational retaliatory behaviors, and organizational citizenship behaviors and how the availability of support can reduce the negative impact of bullying. Using social exchange theory and the conservation of resources theory as theoretical frameworks, we propose that workplace bullying drains personal resources, leading to reduced job performance, low citizenship behaviors, and increased organizational retaliatory behaviors. We also propose that perceived organizational support acts as moderator, such that it reduces the detrimental effects of bullying on employee behaviors.

Research Design and Methods: We tested our hypotheses in two field studies (N?=?478 and N?=?395) conducted in Pakistan.

Results: The results of both studies supported the assertion that workplace bullying exacerbates employees’ job performance, reduces organizational citizenship behaviors and intensifies organizational retaliatory behaviors. The idea that perceived organizational support would moderate the bullying-work behavior relationships found mixed support. While perceptions of organizational support reinforced the bullying-job performance and bullying-retaliatory behaviors relationships, it did not moderate the bullying-citizenship behaviors relationship in the suggested direction.

Conclusion: The findings show that workplace bullying leads to more organizational citizenship behaviors when employee’s perceptions of organizational support is high.     

Do interpersonal features of social anxiety influence the development of depressive symptoms?

This study is a prospective examination of possible interpersonal features of social anxiety that might predict increases in depressive symptoms. It was hypothesised that social anxiety would be associated with avoidance of expressing emotion, lack of assertion, and interpersonal dependency and that these dysfunctional interpersonal styles would predict depressive symptoms one year later while controlling for Time 1 depressive symptoms. One hundred and two undergraduates completed interview and self-report measures of these interpersonal styles in addition to measures of social anxiety and depressive symptoms. Results indicated that social anxiety was associated with all three interpersonal styles. However, only avoidance of expressing emotions predicted Time 2 depressive symptoms. Theoretical implications of these results are discussed.