“…In the mixed condition the low and high ID movements resulted in different velocities, but the velocity profiles (e.g., time of peak velocity) were almost perfectly synchronous (also see Kelso, Putnam, & Goodman, 1983). In Experiments 2 and 3 the targets were placed so that movements were toward the midline or away from the body, yet the results were remarkably similar to that from Experiment 1 (also see Heuer & Klein, 2006;Marteniuk et al, 1984;Spijkers, Tachmatzidis, Debus, Fischer, & Kausche, 1994). Taken together, these findings were interpreted by Kelso et al as indicating that the Blimbs are constrained to act as a single unit^with the more difficult task appearing to determine the time course of both limb movements.…”