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Buy the book (UK): Buy the book (USA): Animations by Cognitive Richard Wiseman is based at the University of Hertfordshire Music: The left and right brained idea is controversial. The research described in the video is here: Ida, Y. (1987). The manner of hand clasping and the individual differences in hemispheric asymmetries. Japanese Journal of Psychology, 58, 318-321. Ida, Y. (1988). The manner of clasping the hands and individual differences in perceptual asymmetries and cognitive modes. Psychologia 31, 128-135. Mohr, C., Thut, G., Landis, T., & Brugger, P. (2003). Hands, arms, and minds: Interactions between posture and thought. Journal of Clinical and Experimental Neuropsychology, 25, 1000-1010. And the case for the right brain-left brain idea being a myth is here: The presenter and producers not responsible for any adverse effects resulting from the use of the information presented in this video and this information is not intended to be a substitute for consulting with a healthcare professional.