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Description of a chronoscope which provides as a power source an air-cooled self-starting synchronous motor driven by the usual 60-cycle A.C. current. Features of the instrument include ease of checking not found in its predecessors, elimination of make-break magnetic-mechanical devices, and...
To study reminiscence effects in paired associates, retention following a two-minute rest period between learning and recall was compared with retention on control trials immediately following learning for the same S's. Experimental conditions were the same as those previously used by the author...
Following criticisms of the usual laboratory experiments which have sought to validate indices of deception, the author describes a new procedure based on the precise psychological reactions which take place when an individual is forced to lie.
Evidence is presented which shows that the effect of fatigue on the fluctuation of illusions of reversible perspective is to increase the rate of fluctuation, thus shortening the intervals of appearance, rather than prolonging them, as reported by McDougall. The author believes that better...
Rhythmical finger movements of psychotic patients made while being questioned about embarrassing details of their histories were reduced to nine indices based on objective characteristics. Three of these indices were combined by multiple correlation technique, giving a composite index. When some...
"The significance for the whole-part problem of identity between successive sections of 32-unit spider mazes was investigated with 3 practiced subjects learning 8 mazes each of 3 types; (a) a 5-unit pattern repeated throughout, (b) 2-unit or 4-unit patterns each specific to an 8-unit part, (c)...
Action potentials from both fore-arms and the calf of the left leg were measured in two groups of subjects while they worked at mental arithmetic and learning nonsense syllables under normal working conditions and under instructions calling for a relaxation of the right arm during work. Muscular...
81 male subjects participated in an experiment in which the knee-jerk was recorded during the exertion of various amounts of muscular effort. Results showed that the amplitude of the knee-jerk bears a linear relationship to the amount of tension exerted on a hand-dynamometer within the range of...
The report includes ground plans of the two floors of the new Parrish laboratories with brief descriptions of the individual rooms and of their special features.
This study was made with the object of investigating phenomena that might emerge when work is prolonged six or seven hours. Subjects tapped with a stylus at maximum speed, alternately on two brass plates. They had consented to work continuously at their maximum rate till they were exhausted. The...
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