Perceptible goals matter, but let's not overdo it!

F. Mechsner's (2004) Imaginative experiments underscored the importance of perceptual-cognitive factors in motor control. However, his account of motor planning is in need of precise operational definitions of its key concepts; the importance of neuromuscular constraints and coordinative stability is not acknowledged in his view on motor execution; and his account of motor learning is challenged by both empirical and anecdotal observations.