Personal ontologies: Generation of user profiles based on the YAGO ontology

Personalized search is aimed at tailoring the search outcome to users; to this aim user profiles play an important role: the more faithfully a user profile represents the user interests and preferences, the higher is the probability to improve the search process.     

Influences of developmental contexts and gender differences on school performance of children and adolescents

This study investigated children and adolescents’ school performance over time focusing on two variables that may influence it: developmental context and gender. The sample comprised 627 participants (M_age?=?11.13, SD?=?1.8), 51% of them female, from grade one to eight, living either with family (n?=?474) or in care institutions (n?=?153). Participants answered individually the Teste de Desempenho Escolar (School Performance Test) and the Structured PRONEX Interview. Findings indicated a main effect of time on school performance (i.e., writing, reading and arithmetic). Furthermore this main effect was further qualified by a time and developmental context interaction and by a time and gender interaction. Interactions revealed that the participants from care institutions attained more significant increases in writing and reading than participants living within a family context; and that girls attained more significant increases in writing than boys. Therefore, school performance progress appears as affected by developmental contexts and gender. The findings reveal how school performance needs to be observed as a multidimensional variable, affected by individual characteristics but also by external ones.     

Gender Differences in Selective Media Use for Mood Management and Mood Adjustment

Mood management theory has found empirical support but was challenged by gender-typed selections and exposure to negative content. These challenges are addressed with response style theory and the mood adjustment approach. A secondary data analysis and original experimental data serve to test hypotheses. As expected, after a mood-impacting experience, men tend to distract themselves with absorbing messages, whereas women tend to ruminate the experience and thus prefer messages with low absorption potential. When anticipating a mood-impacting activity, men tend to distract themselves right before it by selecting absorbing content, whereas women focus on it and prefer less absorbing messages.     

The Roots of Stereotype Threat: When Automatic Associations Disrupt Girls' Math Performance

Although stereotype awareness is a prerequisite for stereotype threat effects (Steele & Aronson, 1995), research showed girls' deficit under stereotype threat before the emergence of math–gender stereotype awareness, and in the absence of stereotype endorsement. In a study including 240 six‐year‐old children, this paradox was addressed by testing whether automatic associations trigger stereotype threat in young girls. Whereas no indicators were found that children endorsed the math–gender stereotype, girls, but not boys, showed automatic associations consistent with the stereotype. Moreover, results showed that girls' automatic associations varied as a function of a manipulation regarding the stereotype content. Importantly, girls' math performance decreased in a stereotype‐consistent, relative to a stereotype‐inconsistent, condition and automatic associations mediated the relation between stereotype threat and performance.     

(Re) thinking Emotions in Visual Education Activities: Students' Experiences

This article focuses on the emotions of 13 and 14 year‐old students related to visual art education activities. Our aim is to understand the interference of the students' emotions with the processes of the creation and reception of their own pictures, as well as their characteristics in an art education context. The article adopts a Vygotskian theoretical perspective about emotion and aesthetic education that refers to the biopsychological nature of emotion and its cultural determination. The need to transform emotions in art activities is stressed and the teenagers' pictures are interpreted as a means of communication. The data collection was based on questionnaires and interviews with seventh and eighth grade secondary school students. It is concluded that students' emotions are not only present in the creative process and in its result, but also that they could have a significant positive or negative impact on students' motivation and achievement behaviour in art education classes. In this context, the students' pictures, acting as stimuli, may evoke their emotions.     

Do sophisticated epistemic beliefs predict meaningful learning? Findings from a structural equation model of undergraduate biology learning

This study investigated the relationships among college students’ epistemic beliefs in biology (EBB), conceptions of learning biology (COLB), and strategies of learning biology (SLB). EBB includes four dimensions, namely ‘multiple-source,’ ‘uncertainty,’ ‘development,’ and ‘justification.’ COLB is further divided into ‘constructivist’ and ‘reproductive’ conceptions, while SLB represents deep strategies and surface learning strategies. Questionnaire responses were gathered from 303 college students. The results of the confirmatory factor analysis and structural equation modelling showed acceptable model fits. Mediation testing further revealed two paths with complete mediation. In sum, students’ epistemic beliefs of ‘uncertainty’ and ‘justification’ in biology were statistically significant in explaining the constructivist and reproductive COLB, respectively; and ‘uncertainty’ was statistically significant in explaining the deep SLB as well. The results of mediation testing further revealed that ‘uncertainty’ predicted surface strategies through the mediation of ‘reproductive’ conceptions; and the relationship between ‘justification’ and deep strategies was mediated by ‘constructivist’ COLB. This study provides evidence for the essential roles some epistemic beliefs play in predicting students’ learning.     

Validation of two accelerometers to determine mechanical loading of physical activities in children

The purpose of this study was to assess the validity of accelerometers using force plates (i.e., ground reaction force (GRF)) during the performance of different tasks of daily physical activity in children. Thirteen children (10.1 (range 5.4–15.7) years, 3 girls) wore two accelerometers (ActiGraph GT3X+ (ACT), GENEA (GEN)) at the hip that provide raw acceleration signals at 100 Hz. Participants completed different tasks (walking, jogging, running, landings from boxes of different height, rope skipping, dancing) on a force plate. GRF was collected for one step per trial (10 trials) for ambulatory movements and for all landings (10 trials), rope skips and dance procedures. Accelerometer outputs as peak loading (g) per activity were averaged. ANOVA, correlation analyses and Bland–Altman plots were computed to determine validity of accelerometers using GRF. There was a main effect of task with increasing acceleration values in tasks with increasing locomotion speed and landing height (P < 0.001). Data from ACT and GEN correlated with GRF (r = 0.90 and 0.89, respectively) and between each other (r = 0.98), but both accelerometers consistently overestimated GRF. The new generation of accelerometer models that allow raw signal detection are reasonably accurate to measure impact loading of bone in children, although they systematically overestimate GRF.