This study developed a test battery to assess the cognitive skills in children with physical limitations. A preliminary battery of 83 items was administered to 26 children, aged 26 to 36 months, with severe physical impairments. Rasch analysis yielded a final battery of 35 items with high internal consistency, interrater reliability, and…

The sequence of development as hypothesized by Piaget has been confirmed for various groups of children by cross-sectional and longitudinal studies. Such consistency has increased interest in constructing scales based on Piaget's theory according to psychometric principles. Three major problems are discussed which present definite obstacles in the…

The Mental Development Scales: Birth to Three Years are instruments designed to assess developmental levels of young children within a setting familiar to the child. They (1) provide a greater understanding of child behavior and development, (2) serve as a basis for planning an individualized curriculum for each child, and (3) furnish the means…