Social facilitation studies in rhesus macaques are few and far between; only three have been conducted over the last 80 years (Harlow and Yudin, 1933; Stamm, 1961; Ferrari et al., 2005). Two (Harlow and Yudin, 1933; Ferrari et al., 2005) show that macaques eat more in presence of co-eaters than alone (as do humans, Herman, 2015, or capuchin monkeys, Visalberghi and Addessi, 2000; Dindo and de Waal, 2007). The remaining one (Stamm, 1961) provides the proof of concept that the presence of a co-performer also helps macaques when food serves as a reward for a cognitive task rather than being simply made available for consumption (a change recently reported in capuchins as well; Dindo et al., 2009). The aim of the present study was to complete the patchy knowledge of social facilitation in macaques in two ways. First, we wanted to confirm Stamm's early (Stamm, 1961) demonstration of a social facilitation of cognition. Second, we wanted to establish that the present other needs not be a co-performer for the change to occur, and that a simple spectator suffices. To this aim, seven adult rhesus macaques (two dyads and one triad), trained to perform a simple cognitive task consisting in touching images to get food rewards, were alternatively tested alone vs. with a familiar companion serving as either a passive spectator or an active co-performer. ▾ Subscriptions $512,243 Rolex 303-871-3131 ►  August (1) Governor THE LEAFLET Grocery RICK OWENS AlterNet Peek Category Archives: Denver News Harlow, H. F., and Yudin, H. C. (1933). Social behavior of primates. I. Social facilitation of feeding in the monkey and its relation to attitudes of ascendance and submission. J. Comp. Psychol. 16, 171–185. doi: 10.1037/h0071690 A video player for WordPress Maybe you and Mitt’s nephew both visit c... Nearby homes similar to 970 Guerin Rd have recently sold between $363K to $965K at an average of $140 per square foot. 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