The four studies presented show how expertise, from the cultural-historical theory of activity, is constructed interactively in everyday problem situations. They also demonstrate that purely situational analyses of discourse are insufficient as attempts to explain expertise. The four studies are presented as individual chapters: (1) Expertise as…

A longitudinal field study conducted in Turku, Finland, traced the development of aggression as a function of the viewing of violence by children from the ages of 7 and 9 to the ages of 15 and 17 to explore the connection between violence viewing and viewers' aggression, and to shed light on the question of causality. The 220 subjects, both male…

Explores the relationship between teenagers' working memory and school achievement. Experiments revealed significant correlations between the two, specifically in the field of foreign language. Includes descriptions of the experiments with accompanying statistical tables. (MJP)

This study sought information on the relationship between cognitive styles (conceptual level and field-independence/field-dependence) and entrance examination criteria of those accepted to teacher education at the University of Helsinki in 1980. The 96 subjects represented prospective class teachers and teachers of handicraft and home economics.…

A study tested hypotheses concerning thinking in a foreign language. Specifically, it looked at whether (1) inferencing in a foreign language relies on mental models and propositional thinking; (2) the three stages of the theory of comprehension apply to understanding foreign-language discourse; and (3) propositional thinking manifests native…