Different asymmetries between expansion and contraction (radial motions) have been reported in the literature. Often these patterns have been regarded as implying different channels for each type of radial direction (outward versus inwards) operating at a higher level of visual motion processing. In two experiments (detection and discrimination…

We investigated the differences in mechanical power flow in early and late practice stages during a cyclic movement consisting of upper arm circumduction to clarify the change in mechanical energy use with skill acquisition. Seven participants practiced the task every other day until their joint angular movements conformed to those of an expert.…

This article describes tests which examined at what ages children could correctly identify right and left sides of pictures of themselves, another person, or an object. (CD)

The human brain is lateralized, different functions being housed in each hemisphere. Several assumptions which are mistakenly considered fact by researchers include: (1) the left hemisphere is for rational functions, while the right is for intuitive functions; (2) the hemispheres do not interact as well with each other as they should; (3) the use…

Lateralization of response to the suggestion of a sensation was recorded in 100 psychiatric patients (16-60 years old) and related to their handedness. (Author)

Forty-two right-handed preschool children listened to dichotic presentations of digit names and were told to report only the digit arriving at the designated ear. A significant right-ear superiority was found, demonstrating a left lateralization of verbal processing in children as young as three years of age. (Author/JMB)

This commentary, written in response to Witelson's work (1987), examines alternative ways of determining how the developmentally stable functional asymmetry (hemispheric specialization) observed in neurologically intact children can be reconciled with the dramatic recovery of function often displayed following unilateral brain damage. (PCB)

Examined relationship between handedness and preferred ear for telephoning in 140 college students. Increased degree of sinistrality was associated with increased tendency to use left ear for telephoning. Found tendency to pick up telephone receiver with preferred hand and hold earpiece to ipsilateral ear. Results may relate to reports of reduced…

Comparison of 28 gifted and 20 normal young children suggested that the gifted child is not neccessarily gifted in all areas. In general, sex and handedness history operate similarly in the gifted and normal groups; males perform better than females and the right-handed children perform better than left-handed children. (Author/CL)

Examines the possible developmental relationship between unimanual handedness and duplicated syllable babbling. Thirty infants were tested at weekly intervals between five months of age and eight weeks after the onset of duplicated syllable babbling. Results suggest developmental change in hemispheric specialization or at least asymmetrical…

Mirror-imaging of letter shapes and reversals of whole words when read or written are defined and explanations are given as to why children tend to make these mistakes. (KW)

To determine whether the idea is empirically supported that the majority of left-handers were intellectually inferior to right-handers, current research was examined. Inquiry indicated that the cognitive performance of left-handers was not significantly lower. (Author/CM)