“…A number of researchers have suggested that the tendency toward in-phase and anti-phase movements of the limbs originates in action constraints of the perception-action system (e.g., Kagerer, Summers, & Semjen, 2003;Kennerly, Diedrichsen, Hazeltine, Semjen, & Ivry, 2002;Peper, de Boer, de Poel, & Beek, 2008), while other researchers suggest that perceptual constraints can play a large role in determining the stability of the bimanual coordination pattern (e.g., Bingham, 2004a,b;Mechsner et al, 2001;Mechsner & Knoblich 2004). Alternately, a number of studies have favored the hypothesis that a coalition of constraints, ranging from high-level perceptual to lower-level motor, modulates the stability of coordinated behavior (e.g., Amazeen, DaSilva, & Amazeen, 2008;Carson & Kelso, 2004;Meesen, Wenderoth, Temprado, Summers, & Swinnen, 2006;Salesse, Temprado, & Swinnen, 2005;Temprado et al, 2003;Shea, Kovacs, & Buchanan, 2009;Swinnen, 2002;Swinnen & Wenderoth, 2004). In other words, depending on the environmental information available, task requirements, and specific muscle groups utilized multiple constraints may inhibit/disrupt the production of the desired coordination pattern without any one constraint taking precedent at all times.…”