To illuminate individual differences in the development of attention-deficit hyperactivity disorder (ADHD) symptoms in the general population, psychometric measures are needed that can capture general population-level symptom variation reliably, validly, and comparably from childhood through to the transition to adulthood. The ADHD subscale of the…

Examined psychometric properties of self-perception scales of the Berkeley Puppet Interview (BPI) with children at preschool, kindergarten, and first grade. Found that young children have a multidimensional self-concept that can be reliably measured. The BPI was sensitive to normative change and individual differences. Support for validity was…

Six papers, originally presented in different form at the 1977 Convention of the Society for Research in Child Development, highlight approximately 100 studies that have used the Defining Issues Test (DIT) of moral judgment. The DIT's standardized format and objective scoring makes comparisons possible among studies, and this body of research…