This article describes a model for response times that is proposed as a supplement to the usual factor-analytic model for responses to graded or more continuous typical-response items. The use of the proposed model together with the factor model provides additional information about the respondent and can potentially increase the accuracy of the…

Fuzzy trace theory posits that during development the use of verbatim information for solving transitive relationships shifts to the use of gist information. In cognitive developmental research that uses a cross-sectional design, the binomial mixture model is often used to identify such shifts. Because the binomial mixture model assumes equal task…

Exploratory and confirmatory factor analyses were used to investigate the factorial validity across gender of the Self-Description Questionnaire III (SDQ III) subscales measuring general, school, English, and mathematics self-concepts. When administered to 516 male/475 female 11th/12th graders in Ottawa (Canada), the questionnaire demonstrated…