Effective category-based induction requires understanding that categories include both fundamental similarities between members and important variation. This article explores 4- to 11-year-olds' (n = 207) and adults' (n = 49) intuitions about this balance between within-category homogeneity and variability using a novel induction task in which…

Recent studies reveal that children can solve proportional reasoning problems presented with continuous amounts that enable intuitive strategies by around 6 years of age but have difficulties with problems presented with discrete units that tend to elicit explicit count-and-match strategies until at least 10 years of age. The current study tests…

The aim of this research was to explore Australian high-school students' argumentation and informal reasoning about biotechnology. Data were obtained from semi-structured interviews with 10 Year-8 students (12-13 years old), 14 Year-10 students (14-15 years old) and 6 Year-12 students (16-17 years old) from six metropolitan high schools in Perth,…

Investigated beliefs about feeling the stares of an unseen other. Found that most adults and young children believed they could feel the unseen stares of another, and across age there were some increases in beliefs about the feeling. Participants believed that in order to feel stares, some cognitive maturity was required. (MOK)

In an attempt to devise a methodology for characterizing children's intuitive theories of drug action, 217 children in Grades 1 to 6 were interviewed about how two substances, alcohol and cocaine, cause behavioral changes in their users. Measures tapped both structure (Piagetian complexity of causal reasoning, coherence, and construction of a…