A progressive time-delay and a trial-and-error strategy were compared in teaching sight word acquisition to two children with severe behavior disorders. Observational learning was also studied. Results found direct and observed instruction both effective, and progressive time delay somewhat more effective than trial and error. (Author/PB)

Utilizing four pairs of preschoolers with Down's Syndrome, the efficacy of two prompt-fading procedures (decreasing assistance and graduated guidance procedure) was compared during instruction of two self-help skills. The efficacy of observational learning was also examined. Both prompt-fading procedures and observational learning were effective…

Outlines six activities for grades six through nine designed to illustrate the processes used by archaeologists. These processes include observation, comparison, classification, communication, use of numbers, and hypothesis formation. (AM)

Attempts to identify deficits in object knowledge specific to the autistic syndrome. Examines the correspondence between sensorimotor and play behaviors and language in mentally retarded and normal children. Determines whether these correspondences are different for autistic, mentally retarded, and normal children.(Author/AS)