The Test of Logical Thinking (TOLT) and the Group Assessment of Logical Thinking (GALT) are two of the instruments most widely used by science educators and researchers to measure students' formal reasoning abilities. Based on Piaget's cognitive development theory, formal thinking ability has been shown to be essential for student achievement in…

This study analyzes the Object Categorization Test (OCT) and the Picture Categorization Test (PCT) to provide (1) psychometric analysis of the tests, (2) substantive analysis detailing variation in performance level as a function of age, race, class, and sex, and (3) normative data yielding frequencies of various score patterns. Data was taken…

Reviews bases for contemporary discontinuity theories of mental development, presents findings that support alternative proposition of continuity and scrutinizes assessment methods from which these continuity results derive. Also offers several models that help explain the continuity findings, and argues that individual differences in mental…

In past Head Start evaluations, cognitive measures have been weighed heavily. This has not accurately reflected the relative unimportance of cognitive program goals; child performance gains are not an objective with high priority for most Head Start programs. Evaluation planners need to weigh previously encountered measurement problems carefully…

The Lexington Development Scale was designed to be used by the teacher as an instrument for assessing developmentally handicapped children, as an aid in helping parents to better understand their child, as a basis for curriculum planning for the total class and especially for the individual child, as a means for evaluating the progress of the…