During the second year of life, infants develop a preference to attach novel labels to novel objects. This behavior is commonly known as "mutual exclusivity" (Markman, 1989). In an intermodal preferential looking experiment with 19.5- and 22.5-month-olds, stimulus repetition was critical for observing mutual exclusivity. On the first…

We propose an "Enhanced Perceptual Functioning" model encompassing the main differences between autistic and non-autistic social and non-social perceptual processing: locally oriented visual and auditory perception, enhanced low-level discrimination, use of a more posterior network in "complex" visual tasks, enhanced perception…

Three children with autism were taught to identify pictures of emotions in response to their spoken names. Their speed of acquisition was compared using a within-child alternating treatments design across three teaching conditions, each involving a 5 second delay to reinforcement. In the marked-before condition, an instruction encouraged the…

This is volume 3 of the series of translations of books from the Soviet literature on research in the psychology of mathematics instruction and on teaching methods influenced by the research. This volume presents a detailed and careful technical analysis of the constituent aspects underlying spatial thinking as well as interesting reports of…

Examines children's knowledge and understanding of global spatial relationships. Utilizing cut-outs of continents to estimate their size in relation to Europe, the students consistently underestimated the size of Asia and overestimated Australia. Possible reasons for this are discussed and teaching approaches suggested. (MJP)