Surveys 5,000 years of artworks, encompassing 1,180 scorable instances of unimanual tool or weapon usage. No systematic trends in hand usage were revealed. Right hand use averaged 93 percent of all cases regardless of which historical era or geographic region was assessed. (SL)

Reports the use of Methylphenidate (Ritalin) as a treatment for hyperkinetic children shows a peak enhancement of learning at a dose of 0.3 milligrams per hilogram of body weight and a peak enhancement of behavior at a dose of 1.0 milligrams per kilogram. (SL)

Hair samples from 31 learning disabled and 22 normal children were analyzed. Significant group differences were determined and a discriminant function was computed which separated the groups with 98 percent accuracy. Elevated lead and cadmium content in the learning disabled group is viewed as being of particular importance. (Author/SL)

Reviews recent research in the treatment and cause of hyperactivity in children. (SL)

Reports results of an experiment involving a hydranencephalic infant lacking cerebral hemispheres and a normal twin in testing for associative learning. Cardiac orienting responses to stimulus omission indicated that learning had taken place in both infants. (CS)

Reports that left-handed subjects, particularly those with mixed hand preference, significantly out performed right-handed subjects in a pitch recognition task. (SL)

Describes tentative federal budget cuts affecting science education in the National Science Foundation, National Aeronautics and Space Administration, Department of Energy, National Institutes of Health, and the specific areas these budget cuts will affect. (DS)