A review of studies on mental retardation published in the Soviet Union between 1970 and 1980 touches on physical and neurological issues, genetic studies, learning and memory, and emotional factors. General conclusions drawn include that more males are retarded or emotionally disturbed than females. (CL)

A two-year study of learning disabilities found in association with French immersion programs indicates that children encountering difficulty in primary French immersion programs have a specific learning disability characterized by a pattern suggesting a maturational lag in the temporal lobe regions of the brain. (JMF)

The study was aimed at establishing the prevalence and clinical features of the psychoses of senescence (senile, presenile, and cerebral arteriosclerotic dementias) in 155 mentally retarded patients over the age of 45. (SBH)

A new method generates specific predictions concerning the expected frequencies of aphasia after unilateral injury to the brain in the left- and right-handed. These predictions are then compared with the observed data for all known studies between 1935 and 1973 to derive the best-fitting model of hemispheric speech lateralization in the left- and…

Parents (N=100) of children (ages 9 to 13) with or without learning disabilities (LD) responded to a retrospective developmental survey. Parents reported that the children with LD had significantly more neurodevelopmental problems or delays across domains (e.g., language, motor, attention, social behavior) than normal achievers. A pattern of…

Examines implications of public interest in findings on brain development for building support for high-quality early childhood education. Discusses how children learn, neural plasticity, and the existence of critical periods. Provides recommendations for parents, caregivers, policymakers, and the public from the Families and Work Institute…

In contrast to the hypothesis that dyslexics possess phonological deficits of neurological origin, the paper proposes that the source of the deficit is primarily experiential. Evidence from normal reading and spelling development as well as from comparisons of dyslexic and nondyslexic readers is offered. (Author/DB)

Surveys progress made in understanding the nervous system's ability to direct its attention to one among several objects, move the eye to focus on one of the objects, and generate limb movements in order to grasp and manipulate the object. (Author/RT)

This article introduces the use of multilayered artificial neural networks in hearing aid noise recognition. It reviews basic principles of neural networks, and offers an example of an application in which a neural network is used to identify the presence or absence of noise in speech. The ability of neural networks to "learn" the…

Psychophysiological measures are generally those in which electrodes measure central or autonomous nervous system or skeletomotor activity with the goals of establishing linkages between the measurement and specific psychological processes. Psychophysiological methods and the difficulties inherent in their use are discussed. Guidelines are…

This paper summarizes empirical findings of research on a theory of general mental ability, based on laboratory studies of the relationship between measurements of individual differences on conventional psychometric tests and in speed and efficiency of information processes. The paper covers characteristics of "g" (general mental ability),…

The construct validity of Boder's typology of dyslexia was investigated using quantified electroencephalography with 39 children (ages 7-11) during a reading task and at rest. Results supported beta frequency differences in anticipated regions by dyslexia subtype during the reading task. However, the direction of difference hypothesis was not…

The arm tremor of adults (n=32) diagnosed as having mental retardation and/or tardive dyskinesia was examined through an analysis of the acceleration properties of several arm postures. The degree of arm acceleration was increased in all subjects compared to a control group without mental retardation. Effects of neuroleptic medication were noted.…

By applying the principles and methods of mechanics to the musculoskeletal system, new insights can be discovered about control of human limb dynamics in both adults and infants. Reviews previous research on how infants gain control of their limbs and learn to reach in the first year of life. (MDM)

Contrary to dogma, the human brain does produce new nerve cells in adulthood. The mature human brain spawns neurons routinely in the hippocampus, an area important to memory and learning. This research can make it possible to ease any number of disorders involving neurological damage and death. (CCM)