Abstract
The present study was done to elucidate the relations among heart rate, digit memory, and time estimation under two different instructions, standard and evaluative. 60 women heard and recalled 8 digits. Subjects reproduced 4-, 8-, and 16-sec. durations of a buzzer and also estimated the durations. Data were discussed in terms of the hypothesis of an inverted U-shaped relationship between arousal and performance. These data suggest relations among the three variables which were influenced by two different instructions.
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