Manual proficiency in Cattle's Intelligence Test in left-handed male and female subjects

The International Journal of Neuroscience
U Tan

Abstract

The relationship between nonverbal intelligence (spatial reasoning) and manual proficiency was studied in male and female left-handers. Manual proficiency was assessed by measuring the speed and accuracy in performing the dot-filling test. Nonverbal intelligence was assessed by Cattle's Culture Fair Intelligence Test. Females were found to be better than males in left-hand performance, and were more lateralized than males in manual proficiency. No significant sex difference could be established in right-hand performance. The right-hand skill was positively correlated to test intelligence (p less than 0.001). There was a negative correlation between the left- minus right-hand skill difference and the scores for nonverbal intelligence (p less than 0.001). The left-hand skill did not show any correlation with nonverbal IQ. It was concluded that the left-hemisphere is of utmost importance even for nonverbal intelligence; strong cerebral lateralization is disadvantageous for spatial reasoning.

References

Jan 1, 1978·Neuropsychologia·D G Thomas, J J Campos
Aug 1, 1987·The International Journal of Neuroscience·U Tan, S Calişkan
Jan 1, 1985·Neuropsychologia·S M Tapley, M P Bryden
Oct 7, 1972·British Medical Journal·R Stott, H Bethell
Sep 1, 1971·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·H L Dee
Mar 1, 1971·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·H Hécaen, J Sauguet

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Citations

Apr 1, 1996·International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology·U Tan
Feb 27, 2008·The International Journal of Neuroscience·Senol DaneUner Tan
Jul 7, 2007·The International Journal of Neuroscience·Uner Tan
Aug 1, 1990·The International Journal of Neuroscience·U Tan

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