Investigating the effects of marijuana on human psychological functioning, this study differs from previous research in two ways: 1) it is concerned with relatively complex cognitive processes; 2) it has a theoretical rationale. The general hypothesis of the study states that marijuana will impair its user's ability to form and use abstract…

Three experiments were conducted that provide a direct examination of within-category discontinuity manipulations on the implicit, procedural-based learning and the explicit, hypothesis-testing systems proposed in F. G. Ashby, L. A. Alfonso-Reese, A. U. Turken, and E. M. Waldron's (1998) competition between verbal and implicit systems model.…

Available for the first time in an English translation, the book reports the results of a series of studies undertaken in the early 1960s on the cognitive development of children with congenital blindness. Chapters one and two review the literaure on such topics as the concept of sensory compensation and the nature of tactual space and provide…

To provide converging support that the proper integration of analog and propositional representational systems is associated with spatial ability, the visual, auditory, and bimodal brain event-related potentials were recorded from 50 right-handed Caucasian males. Sensory interaction indices were derived for these subjects who had taken the Surface…

Incomplete intersensory integration development in schizophrenic children appears to be an underlying source of symptom expression and formation which usually fails to improve with age. (SB)

The purpose of this paper is to gain insight into the nature of the reading process through an understanding of the general nature of sensory processing mechanisms which reorganize and restructure input signals for central recognition, and an understanding of how the grammar of the language functions in defining the set of possible sentences in…

Rorschach protocols of both black and white children from 7 to 14 years of age, who had been evaluated at a child guidance clinic, were rescored with respect to developmental level of perceptual integration. It was found that black children had higher perceptual-integration scores in comparison to their white counterparts. (Author)

The brain perceives, but its perceptions are conditioned by environment. Traditionally education has reinforced that conditioning; today it must give insight into its arbitrainess and cultural ideosyncrasy. (Author/JH)

The objective of the present study was to identify the origin(s) of aging-related behavioral slowing in sensorimotor tasks. For this aim, event-related potentials (ERPs) were analyzed at 64 electrodes to evaluate the strength and timing of different stages of information processing in the brain. Electrophysiological induces of stimulus processing,…

Goals and challenges pertaining to infant sensory and perceptual development are discussed. It is suggested that the inability of researchers to think and talk wisely about "partial accomplishments" in development creates a barrier in developmental research. Conceptual schemes are needed to accommodate these partial accomplishments. Three major…

In an attempt to address the issue of bimodal coordination of featural stimuli, the sensitivity of 3-month-old infants to the auditory and visual components of male and female stimulus configurations was examined. Measures were made of the infants' visual attention to a male or female face while they listened to a male voice, female voice, or to…

Right-hemispheric specialization for tactual processing was investigated in right-handed preschool children. Cross-modal transfer from touch to vision was assessed while children palpated shapes with hand while music was simultaneously played to ear. Left-hand advantage and lateralized nature of interference among older children supports…

In eight experiments, judgments of rectangle area by five-year-olds followed a reliable adding rule: height + width. In collateral work, the children judged the amount of liquid in a glass by a height-only rule. Implications for the Piagetian theories of centration and compensation are drawn. (SJL)

The paper deals with the effects of general experiences and specific educational practices on the structure and functioning of the central nervous system. (CL)