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Erhardt Developmental Products DVDs, Books, and other Materials about Child Development and Children with Disabilities FREQUENTLY ASKED QUESTIONS (FAQs) ABOUT HAND PREFERENCE Q. Hp Media Center M7060n Drivers on this page. What is the difference in meaning between these groups of words?
* Hand dominance, handedness, and hand preference A. Hand dominance means that one hand has the most influence or control. Handedness means that one hand is more reliable for use across a range of skillful acts. Hand preference means that one hand is preferred or chosen. * Cerebral dominance, cerebral lateralization, and cerebral asymmetry A. Cerebral dominance implies that the hemisphere controlling language is the most important one. Cerebral lateralization or asymmetry emphasizes that the hemispheres are different, and the relationship between them is complementary.
* Ambidexterity and mixed dominance A. Ambidexterity is defined as the ability to use both hands equally well, an unusual skill in the normal population. The term mixed dominance has been used to describe a confusion or delay in the development of hand dominance in persons with disabilities.
When does hand dominance emerge in normal development? According to Dr. Arnold Gesell, the developmental progression in the first year begins with use of one hand, then the other, then alternating hands, and then using both hands together, first symmetrically (about 4 months), then one assisting the other (about 1 year). Tasks requiring each hand to perform different skilled movements develop during the preschool years and beyond. A majority of children show a preference by age 3 and most by school age, but Dr. Gesell wrote that hand dominance doesn't become well integrated in some normal children until eight or nine years of age (Gesell & Ames, 1947).
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