Hemispheric Dominance for Deception: A Dual-task Performance Study
Firas Ahmad Al-Hamouri

Abstract
The vast majority of previous research on deception intended to investigate deception detection not the deceptive process per se. This study attempted to investigate the role of left and right hemispheres in deception. Thirty-two (15 males and 17 females) undergraduate students responded to 20 questions truly, and 20 questions deceptively, while finger-tapping with their right/left hand. Results of the study showed greater interference for deception than for truth telling. This main effect was qualified by a significant hand by condition interaction showing more right-hand interference during the deceptive process, implicating more left-hemisphere involvement in deception.

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