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A survey of the literature on the relation between spontaneous activity and maze learning pointed to the absence of any relationship between the two traits. In order to test the supposition that these negative results were due to errors of measurement, the present experiment was undertaken. The...
The author replies to a criticism of his research on reasoning in rats which was recently offered by Wolfe and Spragg. He claims that their criticisms are irrelevant, since the rats used by them were not sufficiently mature, since some of their situations were not duplications of his situation,...
To test the idea (suggested by Zeigarnik's studies on retention of the name of a task) that interruption of a task before its mastery leads to better retention than non-interruption, 100 subjects were trained on stylus mazes under these two conditions. Retention was tested after one week....
The primary aim of this investigation was to determine the reliability of the above measures of sexual vigor and the correlation between them. 33 adult male rats were used. The scores for the direct tests of sexual vigor were based upon observation of copulatory and ejaculatory frequency. The...
A six-unit inclined-plane apparatus is described. It is pointed out that the apparatus is readily mastered, that it is sufficiently reliable for the measurement of individual differences ( = .97), that it is equally useful for work with blind and seeing animals, that performance can easily be...
The purpose of the experiment was to determine whether the white rat may be trained respond to tone. The respiratory response of the animal was conditioned, an electric shock to the tail serving as the unconditioned and the tone produced by a vacuum-tube oscillator as the "conditioned" stimulus....
The authors observed the behavior of 165 female guinea pigs continuously throughout 449 reproductive cycles and 623 oestrous periods. They found the average duration of the reproductive cycle to be 16 days, 6 hours, with a coefficient of variability of 6.1%. Oestrus, defined as the period of...
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