Purpose: Differences in communication development impact long-term outcomes of children with autism. Previous research has identified factors associated with communication in children with autism, but much of the variance in communication skill remains unexplained. It has been proposed that early differences in sensory responsiveness (i.e.,…

Autism is currently one of the most prominent and widely discussed human conditions. Its increased prevalence has intensified the demand for effective educational and therapeutic services, and intervention science is providing mounting evidence about practices that positively impact outcomes. The purpose of this report is to describe a set of…

This paper describes a delayed response experiment which tested children's memory for the location of a hidden object. Eight boys and eight girls at each of two age levels (25 and 37 months) were assigned to each of four experimental conditions and given eight trials in a 9-choice task. On each trial the child saw the object hidden in one of nine…

The relationship between visual stimulus intensity and directional finger movements was examined in infants of two age groups (16 infants, 10 to 15 weeks old, and 8 infants, 20 to 25 weeks old). Two hypotheses derived from Schneirla's Approach-Withdrawal Theory were examined: (1) that responses of the younger, but not of the older infants, would…

Study attempted to determine the viability of optimal level theory as it pertains to infant perceptual and cognitive development. (Authors)

The size of the effective visual field during the first weeks of life is found to depend on two factors: It increases with age, but contracts in the face of competition from ongoing activity such as fixation of a central stimulus or nonnutritive sucking. (Author/SB)

Study supported through a U. S. Public Health Service Fellowship award to Ludwig Immergluck for his work at the Harvard Florence Research Project in Florence, Italy. (AP)

On the basis of a conservation of substance experiment with 189 blind and partially sighted children, it is inferred that while the best of them are performing on a par with the best of their sighted peers, the age range in which conservation is attained is more extended for the visually handicapped. (Author)

Although Ss underestimated the size of the illusion in the predicted direction, no significant correlations between size of illusion and either age or IQ were found. (Authors)

As children grow older they show an increasing preference for classifying objects on the basis of shape rather than color. To clarify the nature of this "dimension preference," children of ages 3 1/2 to 6 1/2 years were given a method of triads test of dimension preferences, followed (after a week's delay) by a component selection task. The most…

Testing Pollack's hypothesis that decreases in effective contour contrast (resulting from a decrease in receptor sensitivity with age or from a change in actual stimulus contrast) lead to decreases in illusion magnitude. Conclusions are questioned by Sjostrom and Pollack (PS 501 740). (Author/MB)

Studies the nature and development of perceptual estimation in a task requiring the coordination of spatial dimensions. (BD)