Factor Analysis of the Dutch-Language Version of the MCMI–III

The reliability and validity of the Road Test was evaluated, using 330 Ss varying in the number of poorly planned geographic movements (flights). Scoring criteria were developed on an independent sample. Interjudge reliabilities were .81 or above (mean = .92). Groups were differentiated on emotional expression and time span. Males and females differed in emotional expression, philosophical attitude toward life, and personal reference. It was concluded that the Road Test could be of value as a measure of life orientation and emotional expression when used in conjunction with other psychological assessment methods.     

Medical Students’ Decisions About Authorship in Disputable Situations: Intervention Study

In medicine, professional behavior and ethics are often rule-based. We assessed whether instruction on formal criteria of authorship affected the decision of students about authorship dilemmas and whether they perceive authorship as a conventional or moral concept. A prospective non-randomized intervention study involved 203s year medical students who did (n = 107) or did not (n = 96) received a lecture on International Committee of Medical Journal editors (ICMJE) authorship criteria. Both groups had to read 3 vignettes and answer 4 questions related to the distinction between conventional and moral domains. Written justification of student’ choices whether the authorship in a vignette was right or wrong was rated by 4 independent raters as based on justice or a rule. Formal instruction had no effect on students’ decisions on authorship in the vignettes (44, 34 and 39% ICMJE-consistent answers for 3 vignettes, respectively, by students receiving instruction vs. 38, 42 and 30% for those without instruction; P > 0.161 for all vignettes). For all dilemmas, more students decided contrary to ICMJE criteria and considered their decisions to be a matter of obligation and not a choice and to be general across situations and sciences. They were willing to change their decision if a rule was different only for peer situations but not for mentor–mentee situations. The number of students who used rule-based justification of their ICMJE criteria-consistent decisions was significantly higher in the instructed than in the uninstructed group. Instruction about formal authorship criteria had no effect on student’s decisions about authorship dilemmas and their decisions were related to the moral rather than a conventional domain. Teaching about authorship and other professionalism and integrity issues may benefit from interventions that bring intuitive processes into awareness instead of those fostering rule-based reasoning.     

Neonatal Intensive-Care Unit Graduates Show Persistent Difficulties in an Intradimensional Shift Card Sort

Neonatal intensive-care unit (NICU) graduates, a group at risk for attention problems and attention-deficit hyperactivity disorder, performed an intradimensional shift card sort at 34, 42, 51, and 60 months to assess executive function and to examine effects of individual risk factors. In the “silly” game, children sorted cards (airplanes and dogs) so they were not the same as targets. In the “same” game, they did the opposite. Performance on the “silly” game was poor, especially when it was presented first. Success in following “silly” game rules improved with age and was significantly linked to maternal education and birth weight for gestational age, a measure of intrauterine stress. Degree of central nervous system injury differentiated children who completed the task from children who did not, and it also affected the need to repeat instructions in the “same” game. These results confirm an increased likelihood of impairments in executive function during preschool years in NICU graduates.     

Parental Attitudes,Attachment Styles,Social Networks,and Psychological Processes in Autism Spectrum Disorders: A Cross-Cultural Perspective

In this study the authors used a cross-cultural approach to examine parental attitudes, attachment styles, social networks, and some of the psychological processes involved in Autism Spectrum Disorders (ASD). Fifty-two children (aged 4–11 years) took part in the study: 30 Italians (15 with ASD and 15 controls) and 22 Cubans (11 with ASD and 11 controls). Findings indicated significant differences between the two cultural groups in terms of the structure of the children's social network and parental attitudes toward their children. However, the mother–child attachment relationship and cognitive and emotional functioning of the study participants were independent of culture.     

Cultural dimensions,socioeconomic development,climate, and emotional hedonic level

A research synthesis was conducted with four studies which correlated national mean self-ratings of affect balance (positive minus negative affect) and subjective well-being with the nations' cultural characteristics (individualism, masculinity, uncertainty avoidance, and power-distance national scores on Hofstede's dimensions), socioeconomic development (Human Development Index), and climate (absolute latitude). A meta-analysis of these collective level cross-cultural studies shows that individualism correlates positively with affect balance and subjective well-being, controlling for socioeconomic development, cultural femininity, power-distance, uncertainty avoidance, and climate. Similar results were found for individual-level data. The meaning of collective-level or national means of individual self-reports of affect balance is discussed.     

A two-point visual control model of steering

When steering down a winding road, drivers have been shown to use both near and far regions of the road for guidance during steering. We propose a model of steering that explicitly embodies this idea, using both a 'near point' to maintain a central lane position and a 'far point' to account for the upcoming roadway. Unlike control models that integrate near and far information to compute curvature or more complex features, our model relies solely on one perceptually plausible feature of the near and far points, namely the visual direction to each point. The resulting parsimonious model can be run in simulation within a realistic highway environment to facilitate direct comparison between model and human behavior. Using such simulations, we demonstrate that the proposed two-point model is able to account for four interesting aspects of steering behavior: curve negotiation with occluded visual regions, corrective steering after a lateral drift, lane changing, and individual differences.     

Which processes are involved in cognitive procedural learning?

Procedural memory is characterised by a relative resistance to pathology, making its assessment of the utmost importance. However, few studies have looked at the cognitive processes involved in cognitive procedural learning. In an initial experiment, we studied the role of different cognitive functions in massed cognitive procedural learning. Our results confirmed the existence of three separate learning phases and, for the first time, demonstrated the involvement of episodic memory and executive functions in the first learning phase. In a second experiment, we studied the effect of distributed learning conditions on the dynamics of procedural learning. This second study confirmed our results but showed that these conditions slow down the process of cognitive procedural learning. Our overall findings call into question the status of functionally autonomous memory system that is currently allotted to procedural memory, and suggest that the role of nonprocedural cognitive components should be taken into account in patient rehabilitation.     

5-HT1a receptor antagonists block perforant path-dentate LTP induced in novel, but not familiar, environments

Numerous studies suggest roles for monoamines in modulating long-term potentiation (LTP). Previously, we reported that both induction and maintenance of perforant path-dentate gyrus LTP is enhanced when induced while animals explore novel environments. Here we investigate the contribution of serotonin and 5-HT1a receptors to the novelty-mediated enhancement of LTP. In freely moving animals, systemic administration of the selective 5-HT1a antagonist WAY-100635 (WAY) attenuated LTP in a dose-dependent manner when LTP was induced while animals explored novel cages. In contrast, LTP was completely unaffected by WAY when induced in familiar environments. LTP was also blocked in anesthetized animals by direct application of WAY to the dentate gyrus, but not to the median raphe nucleus (MRN), suggesting the effect of systemic WAY is mediated by a block of dentate 5-HT1a receptors. Paradoxically, systemic administration of the 5-HT1a agonist 8-OH-DPAT also attenuated LTP. This attenuation was mimicked in anesthetized animals following application of 8-OH-DPAT to the MRN, but not the dentate gyrus. In addition, application of a 5-HT1a agonist to the dentate gyrus reduced somatic GABAergic inhibition. Because serotonergic projections from the MRN terminate on dentate inhibitory interneurons, these data suggest 5-HT1a receptors contribute to LTP induction via inhibition of GABAergic interneurons. Moreover, activation of raphe 5-HT1a autoreceptors, which inhibits serotonin release, attenuated LTP induction even in familiar environments. This suggests that serotonin normally contributes to dentate LTP induction in a variety of behavioral states. Together, these data suggest that serotonin and dentate 5-HT1a receptors play a permissive role in dentate LTP induction, particularly in novel conditions, and presumably, during the encoding of novel, hippocampus-relevant information.