Compound measure of hand-foot-eye preference masked opposite turning behavior in healthy right-handers and non-right-handers: technical comment on Mohr et al. (2003).
A previous article reported opposite turning behavior in right-handers and non-right-handers (C. Mohr. T. Landis, H. S. Bracha, & P. Brugger, 2003). This observation appears contradictory to the 1st study on long-term spontaneous turning behavior in healthy participants (H. S. Bracha, D. J. Seitz, J. Otemaa, & S. D. Click, 1987). These latter authors found a complex interaction between hemispheric dominance, preferred turning side, and sex. C. Mohr et al. (2003) argued that the differentiation of the population in hemisphere-dominant groups by a compound measure of hand-foot-eye preference might have masked their recent finding. Thus, this commentary presents a reanalysis of the original data set (H. S. Bracha et al., 1987). Replicating recent observation, right-handers preferred left-sided turns; and non-righthanders, right-sided turns. This replication strengthens the proposition that handedness and turning behavior might depend on interhemispheric dopamine asymmetries.
Mohr
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Functional Brain Mapping Laboratory (Neurology Clinic) and Rehabilitation Clinic, Geneva University Hospital, Rue Micheli-du-Crest 24 CH-1211 Geneva 14, Switzerland. Christine.Mohr@hcuge.ch.
Bracha
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HS
D000818:Animals; D002755:Choice Behavior / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D011597:Psychomotor Performance / Q000502:physiology*