As part of a larger longitudinal study, scores of 239 children (ages 1 to 4) with disabilities on the Battelle Developmental Inventory (BDI) were compared with scores on the Woodcock-Johnson Test of Achievement (Revised) 1 to 3 years later. The BDI scores from children at or above age 2 predicted later achievement scores (mean correlation .74).…

Rasch calibration procedures were applied to item-response data for the 1,262 infants and toddlers comprising the standardization sample for the Mental Scale of the Bayley Scales of Infant Development. Analyses tend to confirm the psychometric integrity of the instrument. (Author)

This article describes the revised Transdisciplinary Play Based Assessment, a dynamic assessment for children functioning developmentally between infancy and six years that involves the child in play situations, which provide opportunities to assess cognitive, social-emotional, communication and language, and sensorimotor development. Its…