Detailed reports of these experiments are now being prepared and will be ready for publication shortly.

HO /. KRECHEVSKY1 This statement is not intended to mean that there is necessarily a sharp dichotomy between the pre-solution period and the rest of the learning process. It may well be that one shades into the other as far as the effect of any rewarded or punished response is concerned. That is, during the first part of the training process there may be no effect of a correct or wrong jump on the final discriminatory process, then, during a 'transition period' there may be a slight residual effect, or perhaps a maximum effect as a result of some correct responses and none from others due to such factors as 'shifts in attention,' etc., and then a greater and more constant effect.

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of course, a given organism with a given nervous system to do the perceiving. In this connection, in order to avoid any misunderstanding, we are not suggesting that the Gestalt psychologists believe that gestalten exist outside the organism,

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