Bistable perception in normal aging: perceptual reversibility and its relation to cognition

The effects of age on the ability to resolve perceptual ambiguity are unknown, though it depends on frontoparietal attentional networks known to change with age. We presented the bistable Necker cube to 24 middle-aged and OAs (older adults; 56–78 years) and 20 YAs (younger adults; 18–24 years) under passive-viewing and volitional control conditions: Hold one cube percept and Switch between cube percepts. During passive viewing, OAs had longer dominance durations (time spent on each percept) than YAs. In the Hold condition, OAs were less able than YAs to increase dominance durations. In the Switch condition, OAs and YAs did not differ in performance. Dominance durations in either condition correlated with performance on tests of executive function mediated by the frontal lobes. Eye movements (fixation deviations) did not differ between groups. These results suggest that OAs’ reduced ability to hold a percept may arise from reduced selective attention. The lack of correlation of performance between Hold and executive-function measures suggests at least a partial segregation of underlying mechanisms.     

The Roles of Child Gender and Parental Knowledge of Child Development in Parent-Child Interactive Play

In our study, we aimed to analyse the effect of child gender on parental and child interactive play behaviour, as well as to determine relations between parental general knowledge of child development and parental play behaviour in two developmental periods, namely toddlerhood and early childhood. The sample included 99 children (50 toddlers 1–3 years-old; 49 preschoolers 3–5 years-old) and their parents. Parent–child interactive play with a standard set of toys was observed and assessed in the home setting. We found that parental and child play behaviours were closely related in both age groups. In addition, child’s gender affected child, but not parental, play behaviour such that girls more frequently established the content of play, sustained play frame, and used more symbolic transformations during play than boys did. Parents’ general knowledge of child development was associated with both parental education and parental play behaviour. The findings are applicable to different professionals working with children and their parents in the preschool period.     

Type D Personality in the Prediction of Internet Addiction in the Young Adult Population of Slovak Internet Users

This article presents the results of the first study on the relationship between Internet addiction (IA) and Type D personality (D is for distressed) in Slovakia and is the first attempt to examine the impact of Type D personality in the prediction of IA beyond personality dimensions. Altogether 405 adult Slovak Internet users (aged from 18 to 45 years) filled out the following questionnaires: IRPS, DS14, and NEO-FFI. The results showed that there wasn’t a significant effect of the Type D personality on levels of IRPS after controlling for the effect of Big-Five personality traits. The Big Five personality dimensions and demographics explained 21.1 % of variance in IA. According to our results the typical adult addicted to the Internet could be characterized as a young introverted unconscientious and disagreeable neurotic. Future research should concentrate more on the creation and validation of the model of IA.     

Nordic Luther Research in Motion

Abstract : Luther research in the Nordic countries is characterised by both continuation and discussion of its own legacy. Finnish Luther studies have a prominent position here, but are by no means the only actors in Nordic Luther research. Giving an overview of Nordic Luther research in the last decade, the article selects four main topics that have been the focus of special attention: politics and ethics, Communicatio idiomatum and Luther's view on language, Luther as preacher, and Luther and the gift. The article concludes with some comments on the continuing role of creation theology, so strongly emphasised in last century's Scandinavian Luther research.     

Personality and prejudice: from Big Five personality factors to facets

Extending our previous research on personality and prejudice, we tested the predictive power of Big Five facet compared with factor scores in three studies. Study 1 (N=170) examined the predictive power of factors and facets when explaining generalized prejudice, a composite of four prejudice types. Study 2 (N=158) focused on sexism and Study 3 (N=80) examined the impact of personality and experimentally manipulated social norm against expressing sexism. Multiple regression analyses showed the strongest facets (Tender-Mindedness and Values) to outperform the strongest factors (Agreeableness and Openness to Experience) in predicting prejudice in all three studies. We discuss the outcome against the background of previous empirical findings and the two major approaches - the personality and the social psychological - to explaining individual differences in prejudice.     

The perception of subjective contours and neon color spreading figures in young infants

The goal of the present habituation—dishabituation study was to explore sensitivity to subjective contours and neon color spreading patterns in infants. The first experiment was a replication of earlier investigations that showed evidence that even young infants are capable of perceiving subjective contours. Participants 4 months of age were habituated to a subjective Kanizsa square and were tested afterward for their ability to differentiate between the subjective square and a nonsubjective pattern that was constructed by rotating some of the inducing elements. Data analysis indicated a significant preference for the nonsubjective pattern. A control condition ensured that this result was not generated by the difference in figural symmetry or by the local differences between the test displays. In the second experiment, infant perception of a neon color spreading display was analyzed. Again, 4-month-old infants could discriminate between the illusory figure and a nonillusory pattern. Furthermore, infants in a control group did not respond to the difference in symmetry and the local differences between two nonillusory targets. Overall, the results show that young infants respond to illusory figures that are generated by either implicit T-junctions (Experiment 1) or implicit X-junctions (Experiment 2). The findings are interpreted against the background of the neurophysiological model proposed by Grossberg and Mingolla (1985).     

Age‐related changes in transient and oscillatory brain responses to auditory stimulation during early adolescence

Maturational changes in the capacity to process quickly the temporal envelope of sound have been linked to language abilities in typically developing individuals. As part of a longitudinal study of brain maturation and cognitive development during adolescence, we employed dense‐array EEG and spatiotemporal source analysis to characterize maturational changes in the timing of brain responses to temporal variations in sound. We found significant changes in the brain responses compared longitudinally at two time points in early adolescence, namely 10 years (65 subjects) and 11.5 years (60 of the 65 subjects), as well as large differences between adults, studied with the same protocol ( Poulsen, Picton & Paus, 2007 ), and the children at 10 and 11.5 years of age. The transient auditory evoked potential to tone onset showed decreases in the latency of vertex and T‐complex components, and a highly significant increase in the amplitude of the N1 wave with increasing age. The auditory steady state response to a 40‐Hz frequency‐modulated tone increased in amplitude with increasing age. The peak frequency of the envelope‐following response to sweeps of amplitude‐modulated white noise also increased significantly with increasing age. These results indicate persistent maturation of the cortical mechanisms for auditory processing from childhood into middle adulthood.