“…The criticisms of shuttle-avoidance training have been that animals learn it slowly (Baum, 1965) and too few learn it at all (Bindra, 1961). Shuttle-avoiding to airblast, however, is not acquired slowly, but four to 30 times faster than electric shock avoidance (Vanderwolf, 1963;Theios, 1963 represent the range of electric shock data).…”