Atypicalities in sleep and semantic consolidation in autism

Sleep is known to support the neocortical consolidation of declarative memory, including the acquisition of new language. Autism spectrum disorder (ASD) is often characterized by both sleep and language learning difficulties, but few studies have explored a potential connection between the two. Here, 54 children with and without ASD (matched on age, nonverbal ability and vocabulary) were taught nine rare animal names (e.g., pipa). Memory was assessed via definitions, naming and speeded semantic decision tasks immediately after learning (pre‐sleep), the next day (post‐sleep, with a night of polysomnography between pre‐ and post‐sleep tests) and roughly 1 month later (follow‐up). Both groups showed comparable performance at pre‐test and similar levels of overnight change on all tasks; but at follow‐up children with ASD showed significantly greater forgetting of the unique features of the new animals (e.g., pipa is a flat frog). Children with ASD had significantly lower central non‐rapid eye movement (NREM) sigma power. Associations between spindle properties and overnight changes in speeded semantic decisions differed by group. For the TD group, spindle duration predicted overnight changes in responses to novel animals but not familiar animals, reinforcing a role for sleep in the stabilization of new semantic knowledge. For the ASD group, sigma power and spindle duration were associated with improvements in responses to novel and particularly familiar animals, perhaps reflecting more general sleep‐associated improvements in task performance. Plausibly, microstructural sleep atypicalities in children with ASD and differences in how information is prioritized for consolidation may lead to cumulative consolidation difficulties, compromising the quality of newly formed semantic representations in long‐term memory.     

A rejecting baby in a twin set

The notion of a “rejecting” baby has not received much attention in the research literature. One member of a pair of twins which came to our attention provided a good example of a “rejecting” baby. This baby avoided eye contact with all people at close proximity. It is possible that the notion of “rejecting” babies should be attended to by parents, doctors and others involved with the welfare of young children. Perhaps they do not know what to look for in the early phases of this expression. It is possible these early omissions mask detection of later behavioral difficulties, by which time such children have acquired distinctive interactive styles increasingly resistent to modification.     

Religious Experience,Religious Worldviews,and Near-Death Studies

The tense relation prevailing between representatives of conservative religion and other near-death researchers may be illumined by a look at the different functions religion has fulfilled in the past. Religion may be seen as centering on the meaningfulness of the world, on spiritual experience, or on salvation. In this essay, I sketch the place of these themes in the Great Religions. These themes have inherent mutual tensions that in the case of Christianity cannot necessarily be settled by appeal to the Bible, because different Christian groups have somewhat differing views of the source of authority. Furthermore, the Bible's authority is challenged by the results of modern scholarship. In light of these reflections, I see Michael Sabom's Light & Death (1998) as showing valuable data and insights but failing to respond to significant challenges.     

Harm that does not hurt: Humour in coping with self-threat

We examined the affective and cognitive impact of humour on coping with self-threat. Research was based on an incongruity concept of humour that specifies humour as a state resulting from appraising an aversive incident as both harmful and as acceptable. An appraisal related procedural priming paradigm was used to induce humour. In Study 1 (N = 41 female students) the impact of humour on positive and negative affect following self-threat was examined. In Study 2 (N = 52 students; 94% women) we investigated the consequences of humour for a self-serving interpretation of failure, the awareness of harm, and subsequent performance. Relative to the control condition, humour increased positive affect, while not exclusively affecting negative affect, and increased the tendency for an external attribution of failure, while harm was clearly recognized. However, humour led to poorer subsequent performance, suggesting that humour may also have its costs.     

The interactive evolution of human communication systems

This paper compares two explanations of the process by which human communication systems evolve: iterated learning and social collaboration. It then reports an experiment testing the social collaboration account. Participants engaged in a graphical communication task either as a member of a community, where they interacted with seven different partners drawn from the same pool, or as a member of an isolated pair, where they interacted with the same partner across the same number of games. Participants' horizontal, pair-wise interactions led "bottom up" to the creation of an effective and efficient shared sign system in the community condition. Furthermore, the community-evolved sign systems were as effective and efficient as the local sign systems developed by isolated pairs. Finally, and as predicted by a social collaboration account, and not by an iterated learning account, interaction was critical to the creation of shared sign systems, with different isolated pairs establishing different local sign systems and different communities establishing different global sign systems.     

Bridging pure cognitive research and cognitive enrichment

Animal Cognition - Cognitive enrichment is a growing subset of environmental enrichment for captive animals. However, it has been difficult for practitioners to design, implement, and evaluate...     

When proactivity produces a power struggle: how supervisors’ power motivation affects their support for employees’ promotive voice

Previous research informs us about facilitators of employees’ promotive voice. Yet little is known about what determines whether a specific idea for constructive change brought up by an employee will be approved or rejected by a supervisor. Drawing on interactionist theories of motivation and personality, we propose that a supervisor will be least likely to support an idea when it threatens the supervisor’s power motive, and when it is perceived to serve the employee’s own striving for power. The prosocial versus egoistic intentions attributed to the idea presenter are proposed to mediate the latter effect. We conducted three scenario-based studies in which supervisors evaluated fictitious ideas voiced by employees that – if implemented – would have power-related consequences for them as a supervisor. Results show that the higher a supervisors’ explicit power motive was, the less likely they were to support a power-threatening idea (Study 1, N = 60). Moreover, idea support was less likely when this idea was proposed by an employee that was described as high (rather than low) on power motivation (Study 2, N = 79); attributed prosocial intentions mediated this effect. Study 3 (N = 260) replicates these results.     

An especial skill in elite wheelchair basketball players

We aimed to investigate whether an especial skill is present in elite wheelchair basketball players when taking twenty shots with a regular basketball from five different distances (11 ft, 13 ft, 17 ft, & 19 ft) from the basket including the free throw line (15 ft). Twelve elite male basketball players participated. The results showed that as distance increased shot accuracy decreased in line with force by variability predictions for the 11 ft, 13 ft, 17 ft, & 19 ft distances. However, shot performance at the free throw line where players are more familiar with practicing free throw shots did not follow this trend. A linear regression line was drawn to predict performance at the free throw line based on nearer (11 ft & 13 ft) and farer (17 ft & 19 ft) distances to the basket, this was then compared to actual performance. A significant difference between actual and predicted scores was found (p < .05) supporting the presence of an especial skill. Significant positive correlations were found for the 11 ft and 17 ft distance, age, years of playing, and accumulated practice hours with performance at the 15 ft line (p < .05). These correlations imply the operation of generalization in the especial skill. This observation received support from applying a model in which shot accuracy as a function of distance was approximated by two regression lines.     

Proactive climate in a post-reorganization setting: When staff compensate managers' weakness

This study explored the effects of proactive climate on performance in a post-reorganization setting. We hypothesized that proactive climate should have both a direct effect on unit performance and should—in the sense of the “substitutes for leadership” approach—enhance the effect of managers' entrepreneurial attributes (e.g., personal initiative) on unit performance. Hypotheses were tested using data from organizational units, called “centres” (n?=?35), of four recently reorganized public transport organizations. Managers provided ratings of centre performance, and centre members assessed their centre's climate. Proactive climate was positively related with performance. Moderated regression analyses revealed significant interaction effects between proactive climate and some centre manager variables; however, the interaction pattern indicated that proactive climate compensated for a low degree of entrepreneurial attributes.