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Alcohol and Alcoholism Vol. 35, No. 4, pp. 381-383, 2000
© 2000 Medical Council on Alcoholism

SIDE-BIAS IN ALCOHOL AND HEROIN ADDICTS

Manas K. Mandal*, Braj Bhushan1, Anand Kumar2 and Preeti Gupta2

Indian Institute of Technology, Kharagpur,
1 Rajghat Education Centre, Varanasi and
2 M. G. Kashi Vidyapeeth, Varanasi, India

Received 5 January 2000; first review notified 13 March 2000; accepted 27 March 2000

Alcoholics, heroin addicts and normal controls were asked for their degree of preference for the two lateral (left, right) sides during their performance of unilateral activities involving one of the four paired organs, hand, foot, eye and ear. Side-bias was assessed by a questionnaire, with 22 items for hand preference, and five items each for foot, eye and ear preference. Group difference was assessed with a mixed-factorial design (Group x Side) for each form of side-bias. Unlike heroin addicts and normal controls, alcoholics exhibited a significant reduction in right side-bias for all four measures, which suggests an anomalous pattern of lateralization.


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