Intra-individual stability of neuromotor tasks from 6 to 18 years: a longitudinal study

This study investigates the intra-individual stability of the speed of several motor tasks and the intensity of associated movements in 256 children (131 girls, 125 boys) from the Zurich generational study using the Zurich neuromotor assessment battery (ZNA) over a 12-year period from the age of 6 to 18 years. The stability was assessed by correlograms of standard deviation scores calculated from age- and gender-adjusted normative values and compared with standing height and full scale intelligence quotient (IQ). While motor tasks of hand, finger and foot (HFT) and contralateral associated movements (CAM) exhibited a moderate stability (summary measure as correlation coefficients between two measurements made 4 years apart: .61 and .60), other tasks (dynamic balance, static balance and pegboard) were only weakly stable (.46, .47 and .49). IQ and height were more stable than neuromotor components (.72 and .86). We conclude that the moderately stable HFT and CAM may reflect “motor traits”, while the stability of the pegboard and balance tasks is weaker because these skills are more experience related and state-dependent.     

Emotion and narrative fiction: Interactive influences before, during, and after reading

Emotions are central to the experience of literary narrative fiction. Affect and mood can influence what book people choose, based partly on whether their goal is to change or maintain their current emotional state. Once having chosen a book, the narrative itself acts to evoke and transform emotions, both directly through the events and characters depicted and through the cueing of emotionally valenced memories. Once evoked by the story, these emotions can in turn influence a person's experience of the narrative. Lastly, emotions experienced during reading may have consequences after closing the covers of a book. This article reviews the current state of empirical research for each of these stages, providing a snapshot of what is known about the interaction between emotions and literary narrative fiction. With this, we can begin to sketch the outlines of what remains to be discovered.     

Aberrations in emotional processing of violence-dependent stimuli are the core features of sadism

Psychopathy and sadism are personality traits that share emotional deficits and propensity towards violence. However, sadism should be based on additional affective aberrations: pleasant emotional responses to hurting others or witnessing others in pain. In Study 1 (N = 116) emotional responses to violent and peaceful images and their associations with the subclinical trait sadism are analyzed. The results showed that elevated positive emotions when observing violent stimuli and negative emotions as a reaction to peaceful stimuli predicted sadism, even when variance of psychopathy was controlled in the analysis. In Study 2 (N = 156) implicit associations between violence-dependent stimuli (measured by IAT task) and terms describing positive and negative emotions are analyzed. Again, lower negative associations to violent stimuli predicted sadism, together with psychopathic trait of callous affect. The obtained results provide additional clarification of emotional processes in subclinical sadism.     

Mechanisms and neural basis of object and pattern recognition: a study with chess experts

Comparing experts with novices offers unique insights into the functioning of cognition, based on the maximization of individual differences. Here we used this expertise approach to disentangle the mechanisms and neural basis behind two processes that contribute to everyday expertise: object and pattern recognition. We compared chess experts and novices performing chess-related and -unrelated (visual) search tasks. As expected, the superiority of experts was limited to the chess-specific task, as there were no differences in a control task that used the same chess stimuli but did not require chess-specific recognition. The analysis of eye movements showed that experts immediately and exclusively focused on the relevant aspects in the chess task, whereas novices also examined irrelevant aspects. With random chess positions, when pattern knowledge could not be used to guide perception, experts nevertheless maintained an advantage. Experts' superior domain-specific parafoveal vision, a consequence of their knowledge about individual domain-specific symbols, enabled improved object recognition. Functional magnetic resonance imaging corroborated this differentiation between object and pattern recognition and showed that chess-specific object recognition was accompanied by bilateral activation of the occipitotemporal junction, whereas chess-specific pattern recognition was related to bilateral activations in the middle part of the collateral sulci. Using the expertise approach together with carefully chosen controls and multiple dependent measures, we identified object and pattern recognition as two essential cognitive processes in expert visual cognition, which may also help to explain the mechanisms of everyday perception.     

Implicit Theories of Creativity in Higher Education: A Constructivist Study

A qualitative constructivist study was conducted to explore university teachers’ implicit theories of creativity. The aim of the study was to understand how university teachers (NL?=?46) define creativity and perceive its manifestations and development. University teachers’ conceptions of creativity were elicited using the Implicit Theories of Creativity Questionnaire (ITC-Q). The qualitative analysis resulted in five types of implicit theories of creativity and its development: individualistic theories, activity theories, result-oriented theories, relational theories, and growth theories. By including a new theoretical position, target group, and a methodological framework, the study broadened the dialogue about creativity and its development in higher education.     

Auditory change detection: simple sounds are not memorized better than complex sounds

Previous research has shown that the detectability of a local change in a visual image is essentially independent of the complexity of the image when the interstimulus interval (ISI) is very short, but is limited by a low-capacity memory system when the ISI exceeds 100 ms. In the study reported here, listeners made same/different judgments on pairs of successive "chords" (sums of pure tones with random frequencies). The change to be detected was always a frequency shift in one of the tones, and which tone would change was unpredictable. Performance worsened as the number of tones increased, but this effect was not larger for 2-s ISIs than for 0-ms ISIs. Similar results were obtained when a chord was followed by a single tone that had to be judged as higher or lower than the closest component of the chord. Overall, our data suggest that change detection is based on different mechanisms in audition and vision.     

Factors associated with traumatic symptoms and internalizing problems among adolescents who experienced a traumatic event

The aim of the present study was to identify factors that are related to the traumatic symptoms and problem behavior among adolescents who experienced the New Years fire in 2001 in Volendam, The Netherlands. Three groups of factors were considered: pre-trauma (personality and coping), trauma-related (physical and emotional proximity to disaster), and post-trauma factors (received social support). Forty-five adolescents completed the questionnaire. Two years after the disaster, these adolescents experienced significant traumatic stress reaction (70% within the clinical range) and showed clinically significant levels of internalizing problems (37%). Pre-trauma, individual factors were identified as the most important predictors of distress, followed by received social support. The indicators of physical and emotional proximity to disaster explained little variance in distress.     

Inflexibility of experts--reality or myth? Quantifying the Einstellung effect in chess masters

How does the knowledge of experts affect their behaviour in situations that require unusual methods of dealing? One possibility, loosely originating in research on creativity and skill acquisition, is that an increase in expertise can lead to inflexibility of thought due to automation of procedures. Yet another possibility, based on expertise research, is that experts' knowledge leads to flexibility of thought. We tested these two possibilities in a series of experiments using the Einstellung (set) effect paradigm. Chess players tried to solve problems that had both a familiar but non-optimal solution and a better but less familiar one. The more familiar solution induced the Einstellung (set) effect even in experts, preventing them from finding the optimal solution. The presence of the non-optimal solution reduced experts' problem solving ability was reduced to about that of players three standard deviations lower in skill level by the presence of the non-optimal solution. Inflexibility of thought induced by prior knowledge (i.e., the blocking effect of the familiar solution) was shown by experts but the more expert they were, the less prone they were to the effect. Inflexibility of experts is both reality and myth. But the greater the level of expertise, the more of a myth it becomes.     

Studying visual search using systems factorial methodology with target-distractor similarity as the factor

Systems factorial technology (SFT) is a theory-driven set of methodologies oriented toward identification of basic mechanisms, such as parallel versus serial processing, of perception and cognition. Studies employing SFT in visual search with small display sizes have repeatedly shown decisive evidence for parallel processing. The first strong evidence for serial processing was recently found in short-term memory search, using target-distractor (T-D) similarity as a key experimental variable (Townsend & Fifi?, 2004). One of the major goals of the present study was to employ T-D similarity in visual search to learn whether this mode of manipulating processing speed would affect the parallel versus serial issue in that domain. The result was a surprising and regular departure from ordinary parallel or serial processing. The most plausible account at present relies on the notion of positively interacting parallel channels.