Acoustic data for 26 typically speaking 9 to 15 year olds for the /s/ frication were collected and evaluated. Analysis of the reference data set indicated that acoustic characterization of /s/ is appropriately and optimally obtained from the midpoint of /s/, represented in linear scale, referenced to individual linguistic-phonetic contexts,…

A person-centered approach was followed for the study of patterns in personality development in middle childhood through early adolescence. In a longitudinal study of 100 children, the "big five" personality factors--extraversion, agreeableness, conscientiousness, emotional stability, and openness--were assessed in person descriptions by…

First- and second-year findings of a survey of the development of disordered eating in 80 fourth- and fifth-grade girls and 85 boys are presented. Results, especially findings about body mass index and pubertal development, emphasize gender differences and the importance of identifying early risk factors for eating disorders. (SLD)