The purpose of this study is to test certain of the hypotheses arising out of the logic of the work-inhibition theory. In particular, the role of effort in the development of response potential and in the inhibitory resting response will be examined.Solomon (10), in his comprehensive review of the influence of work on behavior, cites the research of at least a dozen investigators who have supported experimentally, in part or in full, a law of least effort. The current theories of Hull ( 5) and his associates (cf. Miller and Dollard [7] and Mowrer [8]), following Pavlov's lead, state in effect that, whereas in any training sequence, the evocation of the response and its subsequent reinforcement leads to an increase in the probability of the occurrence of the response on the next occasion of the presentation of the stimulus, at the same time all responses of the organism give rise to proprioceptive or kinesthetic stimulation which acts as negative motivation and serves to weaken the response tendency.Response-produced stimulation, in addition to having drive value, has the cue value associated with any stimulus, and is thus conditionable. In other words, stimuli associated with the reduction of a need become cues for the response which occurred at the time the need was reduced. Thus response-produced stimuli, associated with a resting response (the response of not-responding), become conditioned to this negative response. A learning series, then, could be represented thus: I S v 15 . ct . D Cf v 3? *. O &. J? O 1 -r Kl -' O2 -' it/2 Ql -' ttl -r O2 -' Kt OJ, -• • • ,