The emergence of gender differences in physical aggression in the context of conflict between young peers

It is well known that a gender difference in physical aggression emerges by the preschool years. We tested the hypothesis that the gender difference is partly due to changing tactics in peer interaction. Observations of girls’ and boys’ social initiatives and reactions to opportunities for conflict were made, using the Peer Interaction Coding System (PICS) in four independent samples of children between 9 and 36 months of age, which were aggregated to form a summary data set (N= 323), divided into two age bands (below or above 24 months of age). Linear mixed‐model analyses revealed significant age by gender interactions in the use of bodily force in response to peers’ initiatives and in the tendency to use bodily force at later stages of conflicts with peers. The gender difference in use of force was not explained by differences in the use of verbal tactics. These cross‐sectional findings suggest that girls are initially more likely than boys to use reactive aggression, but then desist, whereas boys increase their use of force to defend their territory and possessions. The difference between older and younger girls likely reflects girls’ abilities to regulate their behaviour in response to social challenges and the fact that girls are explicitly socialized to yield to peers’ demands.     

Use of electronic games by young children and fundamental movement skills?

This study investigated associations between pre-school children's time spent playing electronic games and their fundamental movement skills. In 2009, 53 children had physical activity (Actigraph accelerometer counts per minute), parent proxy-report of child's time in interactive and non-interactive electronic games (min./week), and movement skill (Test of Gross Motor Development-2) assessed. Hierarchical linear regression, adjusting for age (range = 3-6 years), sex (Step 1), and physical activity (cpm; M=687, SD=175.42; Step 2), examined the relationship between time in (a) non-interactive and (b) interactive electronic games and locomotor and object control skill. More than half (59%, n=31) of the children were female. Adjusted time in interactive game use was associated with object control but not locomotor skill. Adjusted time in non-interactive game use had no association with object control or locomotor skill. Greater time spent playing interactive electronic games is associated with higher object control skill proficiency in these young children. Longitudinal and experimental research is required to determine if playing these games improves object control skills or if children with greater object control skill proficiency prefer and play these games.     

Importing Logics

The novel notion of importing logics is introduced, subsuming as special cases several kinds of asymmetric combination mechanisms, like temporalization [8, 9], modalization [7] and exogenous enrichment [13, 5, 12, 4, 1]. The graph-theoretic approach proposed in [15] is used, but formulas are identified with irreducible paths in the signature multi-graph instead of equivalence classes of such paths, facilitating proofs involving inductions on formulas. Importing is proved to be strongly conservative. Conservative results follow as corollaries for temporalization, modalization and exogenous enrichment.     

Sex and age-related anxiety in a community sample of Norwegian adolescents

The first aim of this study was to estimate the prevalence of anxiety and DSM-related anxiety symptom-clusters among adolescents (13-19 years of age) in middle Norway. A second aim was to examine the developmental trajectories of anxiety symptoms for boys and girls during adolescence. In a cross-sectional study, 1,802 students in junior high schools and high schools in the Mid-Norway Health Region filled out a questionnaire (a response-rate of 77%) including the SCARED self-report form (Birmaher et al., 1997) during one school hour. In line with findings of previous studies, girls reported higher anxiety-levels than did boys. A large gender-specific increase in anxiety in 14-15-year-old girls was also found. Apart from this age-specific effect, the results indicated a general reduction in anxiety during adolescence for all symptom groups except generalized anxiety and school phobia. The high anxiety levels in girls aged 13 to 14 years implicate a need for caution by clinicians because such high anxiety levels may be mistaken for the existence of an anxiety disorder. The rapid increase in anxiety symptoms among girls in early adolescence may reflect a heightened sensitivity in this age group, and may have implications for when to implement secondary prevention programs.     

Validation of the Basic Psychological Needs in Exercise Scale in a Portuguese sample

In line with self-determination theory (SDT: Deci & Ryan, 1985, 2002) the satisfaction of the basic psychological needs for autonomy, competence, and relatedness has been identified as an important predictor of behavior and optimal functioning in various contexts including exercise. The lack of a valid and reliable instrument to assess the extent to which these needs are fulfilled among Portuguese exercise participants limits the evaluation of causal links proposed by SDT in the Portuguese exercise context. The aim of the present study was to translate into Portuguese and validate the Basic Psychological Needs in Exercise Scale (BPNES: Vlachopoulos & Michailidou, 2006). Using data from 522 exercise participants the findings provided evidence of strong internal consistency of the translated BPNES subscales while confirmatory factor analysis supported a good fit of the correlated 3-factor model to the data. The present findings support the use of the translated into Portuguese BPNES to assess the extent of basic psychological need fulfilment among Portuguese exercise participants.     

Meaning of Social Inclusion to Young People Not in Employment,Education or Training

The ‘social inclusion’ of young people, particularly those who are ‘not in education, employment or training’, is a contemporary concern in policy discourses. However, it has been argued that the term ‘social inclusion’ is defined by adults and imposed on young people, and there is little understanding of what ‘social inclusion’ means to young people themselves. Using a participatory methodology, this study investigated what ‘being included’ meant to young people. A qualitative approach with a thematic analysis was used to explore the accounts of 11 participants and yielded three main themes. ‘“Acceptance”—the building blocks of inclusion’ reflected the power of interpersonal acceptance in determining young people's sense of inclusion. ‘“Learning why I don't matter”—when power and discourse shape inclusion’ illustrated how social discourses and power dynamics influenced young people's experience of inclusion. ‘“Keeping up or falling behind”—internalising the discourse of inclusion’ reflected how young people internalised some of these societal definitions of inclusion and responded to them. Those who felt ‘accepted’ or ‘included’ in a ‘mainstream’ sense articulated a sense of agency and hope. For those who did not, it appeared that agency dissolved as did a sense of hope for the future. Although the participants negotiated their ‘inclusion’ through close, trusting relationships with others, the application of the societal discourses of inclusion such as productivity, independence and career mindedness had the potential to leave them feeling excluded, isolated and distressed. Copyright © 2011 John Wiley & Sons, Ltd.     

Do You ‘See’ What I ‘See’? Differentiation of Visual Action Words

Dickinson and Szeligo (Can J Exp Psychol 62(4):211–222, 2008) found that processing time for simple visual stimuli was affected by the visual action participants had been instructed to perform on these stimuli (e.g., see, distinguish). It was concluded that these effects reflected the differences in the durations of these various visual actions, and the results were compared to participants’ subjective ratings of word meaning but it was also possible that word characteristics like length might have influenced response times. The present study takes advantage of word length differences between French and English visual action words in order to address this issue. The goals of the present study were to provide evidence that (1) the processing time differences previously found were due to differences in the cognitive actions represented by these words (and not due to characteristics to the words themselves), and (2) that individuals subjectively differentiate visual action words in such a way that allows for predictable differences in behaviour. Participants differentiated 14 French visual action words along two dimensions. Four of these words were then used in the instructions for a size-discrimination task. Processing time depended on the visual action word in the instruction to the task and differed in a predictable manner according to word meaning but not word length.     

Implementation Intentions Improve Prospective Memory and Inhibition Performances in Older Adults: The Role of Visualization

Implementation intentions have been shown to be a very effective strategy in improving prospective memory in older adults. However, their efficacy in improving inhibition has never been assessed in aging. We thus examined the efficacy of implementation intentions in a prospective memory task and an inhibition task in 87 older participants. Following a crossover design, half of the participants were instructed to form an implementation intention in the prospective memory task, the other half in the inhibition task. The moderating role of working memory, visualization and verbalization habits, and impulsivity were also assessed. Regression analyses revealed that for both tasks, participants benefited from implementation intentions but only if they were used to using visual strategies in daily life. The efficacy of implementation intentions was not moderated by working memory, impulsivity, or the use of verbal strategies in everyday life. Copyright © 2014 John Wiley & Sons, Ltd.