Investigated effects of changing the level of motor planning demands in simple drawing tasks for which children aged 5-11 years completed or copied squares and diamonds. Results were consistent with previous studies. Low planning demands resulted in less difference between square and diamond performance than did tasks demanding higher planning.…

Acoustic and video data tracing the development of intrasyllabic coarticulation suggest that young children (n=30; ages three, five, and eight) and adults (n=10) produce similar patterns of anticipatory coarticulation, and perceptual data indicate that coarticulatory cues in the speech of three year olds are less perceptible than those of the…

Development of ambulation was studied with 1,744 children, ages 3 to 10, with moderate to profound mental retardation. Although the probability of improvement declined with age, some improvements in basic skills did occur far past the normative age for development of speech and ambulation, across all levels of mental retardation. (Author/DB)