Piaget's class-inclusion task was revised class-inclusion tasks were administered to 64 kindergarten and 64 first-graders. Each of the revisions enhanced performance as compared with Piaget's standard procedures. These results are considered in terms of two possible interpretations. (Author/SDH)

Presents an investigation of the hypothesis that an increase in the salience of the total class dimension should improve class-inclusion performance. Subjects were 220 children in kindergarten through third grades. (SDH)

This study was designed to determine the extent to which (speech) motor timing control, as defined by a statistical model, improves in consistency with age and the degree to which peripheral feedback is used by children to maintain this consistency. Clinical applications and possible genetic implications are discussed. (Author/ED)

Reviews 26 instruments developed to assess temperament at the infant, preschool, and school-age levels, giving particular attention to instrument content, standardization samples, reliability, and validity. It is concluded that, at present, no single psychometrically adequate instrument is available. Suggestions are made for future approaches to…