In a series of 3 experiments, the authors investigated the influence of symmetry of variables on children's and adults' data interpretation. They hypothesized that symmetrical (i.e., present/present) variables would support correct interpretations more than asymmetrical (i.e., present/absent) variables. Participants were asked to judge covariation…

Conceptualizations of developmental trends are driven by the particular method used to analyze the period of change of interest. Various techniques exist to analyze developmental data, including individual growth curve analysis in observed and latent frameworks, cross-lagged regression to assess interrelations among variables, and multilevel…

The fact that the suggestion to cluster was capable of offsetting social class differences in recall is discussed in terms of Jensen's recommendations for differential education of middle- and lower-class children. (Authors)

The relative weakness of sex-role labels as reinforcers, and the disappearance of differential effectiveness of male and female labels at the fourth-grade level would appear to be congruent with Kohlberg's (1966) cognitively based theory of sex-role acquisition. (Authors)