Fifteen male subjects classified as Type A personalities (aggressive, impatient) and fifteen Type B (passive, patient) subjects performed a psychophysical lifting task under three social facilitation conditions: alone (box lowered automatically), with a confederate of similar physical ability lowering the box, and with a confederate of superior physical ability lowering the box. Results indicated that Type A subjects worked at a higher percentage of their aerobic capacity than Type B subjects, and spent less time deciding their maximum acceptable weight. The social facilitation conditions had no significant effect on maximum acceptable weight of lift.
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