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Article: Cognitive performance and left-handedness: comparative analyses in adults with seizures, physical, psychological and learning disorders in a rehabilitation setting.
- Article from:
- The Journal of Rehabilitation
- Article date:
- January 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 National Rehabilitation Association. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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In western societies today, about 90% of the adult population is said to be right-handed, with the remaining 10% consisting of persons variably identified as left-handed, ambidextrous, and/or ambiguously handed (McManus, 2002; Soper, Satz, Orsini, Henry, Zvi, & Schulman, 1986). Though widely cited, this 9:1 demographic ratio appears not to be as ubiquitous or generalizable as commonly thought. For example, some studies have revealed smaller numbers of left-handers with advanced age (Coren, 1992; Ellis, Ellis, & Marshall, 1988), more left-handers today than just a century ago (Fleminger, Dalton, & Standage, 1977; McManus, 2002), and lower incidences of left-handedness in ...