The purpose of this study was to identify the nature of the information which preschool-age children must attend to and maintain within problems in order to solve a series of two-choice simultaneous discrimination problems. Twenty-four preschool children participated in the experiment. The stimuli used in these problems consisted of planometric…

Three autistic boys (ages 9-13) were trained to select a card containing a stimulus array comprised of three visual cues. Decreased distance between cues resulted in responses to more cues, increased distance to fewer cues. Distances did not affect the responding of children matched for mental and chronological age. (Author/JW)