BACKGROUND A large proportion of UK children do not reach the recommended levels of physical activity (PA) required for optimum health. Few studies have investigated the psychosocial correlates of objectively measured PA in preadolescents. This study examined child attitudes and parental behaviours as correlates of children's activity. METHODS In total, 278 children (138 boys and 140 girls) a...

Using cellular automata, the authors show how mutual influences among elements of self-relevant information give rise to dynamism, differentiation, and global evaluation in self-concept. The model assumes a press for integration that promotes internally generated dynamics and enables the self-structure to operate as a self-organizing dynamical system. When this press is set at high values, the ...

The 'self' is increasingly used as a variable in cognitive experiments and correlated with activity in particular areas in the brain. At first glance, this seems to transform the self from an ephemeral theoretical entity to something concrete and measurable. However, the transformation is by no means unproblematic. We trace the development of two important experimental paradigms in the study of...

This study investigated longitudinal predictors of proactive goals and activity participation at age 80 among members of the Terman Study of the Gifted. The participants were 242 individuals between the ages of 75 and 84 (M = 79.53) who responded to questionnaires in 1992, 1972, and 1950. Proactive goals included goals for involvement and achievement. Activity participation included intellectua...

The relationship between academic self-concept and academic achievement of Chicano(a) and/or Mexican American students at Colorado State University was investigated in this study. The participants included 114 undergraduate, full-time students who self-identify as Chicano(a) and/or Mexican American. The quantitative instrument utilized to measure academic self-concept was developed by Reynolds,...

Existing literature evidences the association between adolescents' school self-concept and engagement, both concepts being related to students' perception of teachers and peers as motivators. However, few longitudinal studies explore the interplay of these factors. The present study aims to close this gap, applying latent cross-lagged panel design to two-wave data from German adolescent student...

PURPOSE OF THE STUDY This study explores (a) whether retirees' formal volunteer experiences represent an extension of their career in the paid workforce; and (b) how this integration of life roles affects career self-concept, as interpreted through Donald Super's life-span, life-space theory of career development. DESIGN AND METHODS A survey was conducted involving a Canadian sample of 214 in...

Little is known of nurses' self-concept in light of their professional identity or as working adults. This article explores the development and rigorous testing of a new self-concept instrument designed specifically for nurses. The new measure is based on the self-concept measurement theory of Shavelson, Hubner, and Stanton. An expert panel was used to critique and aid refinement of the measure...