Piaget's theory of stages of sensorimotor development is supported in cross-sectional and longitudinal validation employing Guttman's scalogram analysis. (MH)

A total of 45 boys in age groups corresponding to kindergarten, third grade, and sixth grade learned a 40-centimeter linear arm movement without the aid of vision. In each age group, 15 attempted to reproduce the movement using either distance, location, or distance plus location cues. (Author/RH)

The purpose of this study was to determine if performance and learning of mildly retarded children on a rotary pursuit task was facilitated by various types of supplementary, concurrent sensory feedback and if supplementary feedback presented during either correct or incorrect responding differentially affected motor learning. (Author/SJL)

The results suggest that coding for storage in the short-term memory is effective when learning occurs under incidental conditions; however, long-term storage appears to be significantly affected by the intention to learn and the foreknowledge of a recall test. (MM)

The results of this study indicate that both single-goal and multi-goal variable practice conditions, given adequate amounts of practice, will lead to the development of a motor schema capable of accurately producing a novel response. (MM)

Factors contributing to successful performance of ball skills are examined. (MM)

Learning is possible in the absence of knowledge of performance when knowledge of results is present, but a higher level of performance is achieved when both types of information are present. (MM)

Ten subjects with right-brain lesions were compared with 10 healthy subjects on psychomotor tasks (pursuit tracking). The injured group was able to learn the task but were slower at correcting unanticipated errors and did not respond to changes in the probable direction of movement. (SK)

Using lexical decision, the effects of primes of different length on spoken word recognition were evaluated in three partial repetition priming experiments. Prime length was determined via gating (Experiments 1a and 2a). It was shorter than, equivalent to, or longer than the recognition point (RP), or a complete word. In Experiments 1b and 1c,…

People update egocentric spatial relations in an effortless and on-line manner when they move in the environment, but not when they only imagine themselves moving. In contrast to previous studies, the present experiments examined egocentric updating with spatial scenes that were encoded linguistically instead of perceived directly. Experiment 1…

Restricted and repetitive behaviors (RRBs) on the Autism Diagnostic Interview- Revised (ADI-R: Lord, Rutter, & Le Couteur (1994) were examined in 165 children with Autism Spectrum Disorders (ASD), 49 children with non-spectrum developmental disorders (DD), and 65 children with typical development (TD) at approximately 2 years of age. A factor…

Compared were the performances on a visual-motor task of 130 8-to 30-year-old retarded persons with separate etiologies but similar intelligence levels (in five categories ranging from IQ 30-91). (Author/CL)

The paper describes approaches used to assess preverbal or nonverbal orthopedically handicapped infants. The first section describes a conceptual approach to development that differs from the normative approach. The conceptual development model emphasizes developmental structures rather than successive cumulative acquisitions of behavior. This…

This paper takes the position that toys can significantly modify children's behavior and that considerable care needs to go into the decisions one makes when buying a toy. Toys are regarded as educational aids and sources of potential learning. A given toy can provide a variety of lessons. Such lessons include: (1) learning about the various…

A STUDY WAS CONDUCTED TO DETERMINE WHETHER PEOPLE CAN CHANGE THEIR PERCEPTUAL PROCESSING STRATEGIES TO INCLUDE TESTS FOR THE PRESENCE OF ONLY THOSE STIMULUS FEATURES NECESSARY FOR THE TASK AT HAND. LEARNING DURING PRACTICE AND THE EFFECT OF AGE ON THE ABILITY TO USE OPTIMAL STRATEGIES WERE INVESTIGATED. A DISJUNCTIVE REACTION TIME PROCEDURE WAS…