Thirteen infants were presented with a moving object under two lighting conditions to investigate the role of vision in early reaching. Infants were tested twice, at 5 and 7.5 months of age. The results suggest that proprioceptive feedback and sight of the target allowed for successful reaching with limited visual information, even in relatively…

Sensorimotor functioning in 10 autistic children, age 3-7, was assessed on object permanence, means-end, causality, vocal and gestural imitation, the construction of objects in space, and schemes for relating objects. The number and diversity of pragmatic functions in the children's communication were also analyzed and related to sensorimotor…

The Minnesota Percepto-Diagnostic Test-Revised (MPDT-R) and the Comprehensive Test of Basic Skills were administered to 40 Navajo, 40 Papago, 40 Hopi, and 40 Caucasian children. All of the children were in regular classrooms, but the results of a one-way analysis of variance indicated significant differences among the four groups on the MPDT-R…

This study evaluated eye-blink conditioning in 11 persons with autism (ages 11 to 22). Compared to matched controls, persons with autism learned the task faster but performed short-latency, high-amplitude conditioned responses. Results suggest this population has the ability to rapidly associate paired stimuli but may have impairments in…

Comparison of 224 Pennsylvania secondary agricultural education students with a national sample showed that (1) the Pennsylvania students' cognitive skills were less developed; (2) their preferred responses to information were auditory and emotive; (3) small group and hands-on were preferred environments; and (4) they were less likely to prefer…

Adaptive control of thought-rational (ACT-R; J. R. Anderson & C. Lebiere, 1998) has evolved into a theory that consists of multiple modules but also explains how these modules are integrated to produce coherent cognition. The perceptual-motor modules, the goal module, and the declarative memory module are presented as examples of specialized…

Recent work on perceptual learning shows that listeners' phonemic representations dynamically adjust to reflect the speech they hear (Norris, McQueen, & Cutler, 2003). We investigate how the perceptual system makes such adjustments, and what (if anything) causes the representations to return to their pre-perceptual learning settings. Listeners are…

Autism is a developmental disorder affecting the lives of thousands of children. According to the Centers for Disease Control and Prevention (CDC), approximately 34 in 10,000 children ages 3 to 10 years of age have autism (CDC, 2004). The Autism Society of America (ASA) reports that 1 in 166 babies born today will develop autism spectrum disorder…

In this article, the authors propose to characterize sequence learning in terms of automatic versus nonautomatic processing and to apply this contrast independently to knowledge acquisition and retrieval. In several experiments of sequence learning, automaticity of both the acquisition and retrieval of the acquired knowledge was independently…

The terrestrial slug "Limax" has a highly developed ability to associate the odor of some foods (e.g., carrot juice) with aversive stimuli such as the bitter taste of quinidine solution. The procerebrum (PC) is a part of the slug's brain thought to be involved in odor-aversion learning, but direct evidence is still lacking. Here, the authors…

According to Jaan Valsiner, development takes place within culturally structured environments jointly organized by the activities of children and the people around them. When overlap between promoted activity and the child's zone of proximal development exists, the structure of action that results from the interplay of the two is internalized by…

Data gathered by a national survey of preschool playground equipment provided comprehensive information on all aspects of the play environment for young children. This collection presents the perspectives of writers on the function of playgrounds and the nature of children's play. In adition to the introduction by Sue C. Wortham and Joe L. Frost,…

Sports-related tool use abilities in children were investigated within a neo-Piagetian framework of development. The object was to establish whether development in the motor domain proceeds in a "stage-like" fashion. A model was developed which suggested how general and precise structural changes might manifest themselves in the sub-domain of tool…