ABSTRACT
I. P. Pavlov's personality theories in the normal field may have suffered from the execrable translations through which alone most English-speaking readers will have been able to become acquainted with them. The theory just outlined tells that individuals in whom excitatory potentials are generated quickly and strongly and in whom inhibitory potentials are generated slowly and weakly will tend to be introverted in personality. W. M. Lepley and C. L. Hull have elaborated the inhibition theory adopted to include the well-known bowing effect observable in serial nonsense syllable learning. The personality tests used by Broadbent included the Guilford R scale and measures of 'level of aspiration'; the watch-keeping tasks used included a choice serial reaction task, mental arithmetic, and the 20-dials and 20-lights tests, in which random changes on one of twenty presentation panels had to be signalled.
