Imagery intervention in open and closed tennis motor skill performance

To assess use of imagery intervention in performance of two tennis motor skills the quasi-experimental design included a pre- and posttest and a control group. The tennis service shot and service receiving skill were selected as representative of open and closed skills, respectively. 48 subjects, male tennis players, whose ages ranged from 16 to 18 yr. (M = 17.2), were divided into two groups: (1) Technical practice only which was used as control group and (2) Imagery group who received both imagery and technical practice. Analysis of covariance showed a significant main effect for the imagery intervention on the closed skill (p = .002). Findings suggest that imaging a positive outcome may be more powerful in improving performance of closed skill movements than of open skill movements.     

Selective inactivation of adenosine A(2A) receptors in striatal neurons enhances working memory and reversal learning

The adenosine A(2A) receptor (A(2A)R) is highly enriched in the striatum where it is uniquely positioned to integrate dopaminergic, glutamatergic, and other signals to modulate cognition. Although previous studies support the hypothesis that A(2A)R inactivation can be pro-cognitive, analyses of A(2A)R's effects on cognitive functions have been restricted to a small subset of cognitive domains. Furthermore, the relative contribution of A(2A)Rs in distinct brain regions remains largely unknown. Here, we studied the regulation of multiple memory processes by brain region-specific populations of A(2A)Rs. Specifically, we evaluated the cognitive impacts of conditional A(2A)R deletion restricted to either the entire forebrain (i.e., cerebral cortex, hippocampus, and striatum, fb-A(2A)R KO) or to striatum alone (st-A(2A)R KO) in recognition memory, working memory, reference memory, and reversal learning. This comprehensive, comparative analysis showed for the first time that depletion of A(2A)R-dependent signaling in either the entire forebrain or striatum alone is associated with two specific phenotypes indicative of cognitive flexibility-enhanced working memory and enhanced reversal learning. These selective pro-cognitive phenotypes seemed largely attributed to inactivation of striatal A(2A)Rs as they were captured by A(2A)R deletion restricted to striatal neurons. Neither spatial reference memory acquisition nor spatial recognition memory were grossly affected, and no evidence for compensatory changes in striatal or cortical D(1), D(2), or A(1) receptor expression was found. This study provides the first direct demonstration that targeting striatal A(2A)Rs may be an effective, novel strategy to facilitate cognitive flexibility under normal and pathologic conditions.     

Mental fatigue disturbs local processing more than global processing

Focusing of attention is influenced by external features such as the presence of global or local target stimuli, but also by motivation and mood states. In the current study, we examined whether working on cognitively demanding tasks for 2 h, which induces mental fatigue, subsequently had a differential effect on global and local processing. The results showed that, compared to non-fatigued participants, fatigued participants particularly displayed compromised local processing. This indicates that mental fatigue may also manifest itself as effects on attentional focusing. The findings of this study are in line with recent ideas about the nature of fatigue-related cognitive deficits, implying disturbances in the control over attention and behaviour.     

Priming effects for affective vs. neutral faces

Affective and Neutral Tasks (faces with negative or neutral content, with different lighting and orientation) requiring reaction time judgments of poser identity were administered to 32 participants. Speed and accuracy were better for the Affective than Neutral Task, consistent with literature suggesting facilitation of performance by affective content. Priming effects were significant for the Affective but not Neutral Task. An Explicit Post-Test indicated no conscious knowledge of the stimulus frequency that was associated with performance facilitation. Faster performance by female vs. male participants, and differential speeds and susceptibility to priming of different emotions were also found. Anger and shock were responded to most rapidly and accurately in several conditions, showed no gender differences, and showed significant priming for both RT and accuracy. Fear and pain were responded to least accurately, were associated with faster female than male reaction time, and the accuracy data showed a kind of reverse priming.     

Learning and memory deficits upon TAU accumulation in Drosophila mushroom body neurons

Mutations in the neuronal-specific microtubule-binding protein TAU are associated with several dementias and neurodegenerative diseases. However, the effects of elevated TAU accumulation on behavioral plasticity are unknown. We report that directed expression of wild-type vertebrate and Drosophila TAU in adult mushroom body neurons, centers for olfactory learning and memory in Drosophila, strongly compromised associative olfactory learning and memory, but olfactory conditioning-relevant osmotactic and mechanosensory responses remained intact. In addition, TAU accumulation in mushroom body neurons did not result in detectable neurodegeneration or premature death. Therefore, TAU-mediated structural or functional perturbation of the microtubular cytoskeleton in mushroom body neurons is likely causal of the behavioral deficit. These results indicate that behavioral plasticity decrements may be the earliest detectable manifestations of tauopathies.     

When Breaking the Rules Relates to Creativity: The Role of Creative Problem-Solving Demands and Organizational Constraints

Drawing on theoretical views of creative deviance, the present study hypothesized that employees with a tendency to break rules are more creative at their jobs (Hypothesis 1). Furthermore, we expected that this is particularly the case when employees face high problem-solving demands (i.e., they are expected to be creative) but at the same time they face high organizational constraints (e.g., they are not given the resources they need in order to be creative; Hypothesis 2). To test these expectations, we conducted a cross-sectional survey study (Study 1) and a daily diary survey study (Study 2) among employees from different occupational groups. Study 1 provided evidence that employee rule-breaking is related to other-rated employee creativity. Study 2 replicated this finding with a day-level measure of self-rated employee creativity. Furthermore, multilevel regression analyses revealed that the link is stronger when day-level problem-solving demands and organizational constraints are both high. Our findings contribute to the literature by providing empirical support to hardly examined propositions, namely, that non-compliant behaviors (i.e., rule-breaking) and obstacles (i.e., organizational constraints) may, in fact, boost creativity. Finally, suggestions for practice are made, recognizing the challenges posed to management in regulating employee rule-breaking.     

Effect of prefrontal cortex damage on resolving lexical ambiguity in text

The function of suppression of context-inappropriate meanings during lexical ambiguity resolution was examined in 25 adults with prefrontal cortex damage (PFCD) localized to the left (N=8), right (N=6), or bilaterally (N=11); and 21 matched Controls. Results revealed unexpected inverse patterns of suppression between PFCD and Control groups, with measures suggesting decreased interference across time in the PFCD group and increased interference in the Control group. The PFCD group, however, had significantly lower accuracy rates for the context-inappropriate condition. Results suggest a loss of the control aspects of inhibitory processes in lexical ambiguity resolution following PFCD. An aging effect on suppression function is also suggested.     

Reducing the effects of the stereotype threat that girls perform less well than boys in mathematics: the efficacy of a mixed debate in a real classroom situation

The present research aims at testing the effects of the mixed debate in a classroom situation on reducing the stereotype threat according to which girls perform less well than boys in mathematics. Our work is based on studies conducted on stereotype threat (Steele and Aronson in J Person Soc Psychol 69:797–811. https://doi.org/10.1037//0022-3514.69.5.797, 1995), as well as those aiming to reduce the impact of stereotype threat on stereotyped populations (Huguet and Régner in J Educ Psychol 99(3):545–560. https://doi.org/10.1037/0022-0663.99.3.545, 2007; Marx and Roman in Personal Soc Psychol Bull 28:1185–1197. https://doi.org/10.1177/01461672022812004, 2002; Spencer et al. in J Exp Soc Psychol 35:4–28. https://doi.org/10.1006/jesp.1998.1373, 1999). We will more particularly study Smith and Postmes' (Br J Soc Psychol 50(1):74–98. https://doi.org/10.1348/014466610X500340, 2010) work on small group discussions used to reduce the influence of the threat. Results indicate that having a debate as such reduces the impact of the stereotype threat in girls. Possible interpretations of the results and future research perspectives will be put forward.