Absence of leftward bias in a line-bisection task is often used as a clinical hemispheric indicator, but the effect is not uniform in a normal population. Sex, handedness, and strategy variables affect the strength and direction of any bias.
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References
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BrodieE. E., & PettigrewL. E. (1996) Is left always right? Directional deviations in visual line bisection as a function of hand and initial scanning direction. Neuropsychotogia, 34, 467–470.
