| 21. | In 1965, Robert Zajonc developed the activation theory, by proposing his generalized drive hypothesis for social facilitation.
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| 22. | In 2009, Dindo, Whiten, and de Waal studied the effect of social facilitation in capuchin monkeys.
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| 23. | Evaluation apprehension, however, is only key in human social facilitation and is not observed in other animals.
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| 24. | "A . pallipes " has been observed to display social facilitation for recruitment to food resources.
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| 25. | Zajonc's drive theory is based on an experiment involving the investigation of the effect of social facilitation in cockroaches.
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| 26. | Cottrell's evaluation apprehension model later refined this theory to include yet another variable in the mechanisms of social facilitation.
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| 27. | The first published study in this area was an experiment in 1898 by Norman Triplett, on the phenomenon of social facilitation.
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| 28. | The fact that half of his participants showed no evidence of social facilitation would suggest that one should avoid overstating these findings.
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| 29. | The self-presentation approach to social facilitation has two main theories : one regarding arousal or drive, and one without.
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| 30. | One study found that EPM did enhance productivity, but only in ways that are consistent with the effects of social facilitation.
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