title: Dissecting the mechanisms of squirrel monkey (Saimiri boliviensis) social learning.
abstract: Although the social learning abilities of monkeys have been well documented, this research has only focused on a few species. Furthermore, of those that also incorporated dissections of social learning mechanisms, the majority studied either capuchins (Cebus apella) or marmosets (Callithrix jacchus). To gain a broader understanding of how monkeys gain new skills, we tested squirrel monkeys (Saimiri boliviensis) which have never been studied in tests of social learning mechanisms. To determine whether S. boliviensis can socially learn, we ran "open diffusion" tests with monkeys housed in two social groups (N = 23). Over the course of 10 20-min sessions, the monkeys in each group observed a trained group member retrieving a mealworm from a bidirectional task (the "Slide-box"). Two thirds (67%) of these monkeys both learned how to operate the Slide-box and they also moved the door significantly more times in the direction modeled by the trained demonstrator than the alternative direction. To tease apart the underlying social learning mechanisms we ran a series of three control conditions with 35 squirrel monkeys that had no previous experience with the Slide-box. The first replicated the experimental open diffusion sessions but without the inclusion of a trained model, the second was a no-information control with dyads of monkeys, and the third was a 'ghost' display shown to individual monkeys. The first two controls tested for the importance of social support (mere presence effect) and the ghost display showed the affordances of the task to the monkeys. The monkeys showed a certain level of success in the group control (54% of subjects solved the task on one or more occasions) and paired controls (28% were successful) but none were successful in the ghost control. We propose that the squirrel monkeys' learning, observed in the experimental open diffusion tests, can be best described by a combination of social learning mechanisms in concert; in this case, those mechanisms are most likely object movement reenactment and social facilitation. We discuss the interplay of these mechanisms and how they related to learning shown by other primate species.
authors: Lester E. Fisher Center for the Study and Conservation of Apes , Lincoln Park Zoo , Chicago, IL , USA ; Language Research Center , Georgia State University , Atlanta, GA , USA.
authors: Lm
authors: L
authors: Hopper
authors: An
authors: A
authors: Holmes
authors: LE
authors: L
authors: Williams
authors: Sf
authors: S
authors: Brosnan
keywords: Emulation; Ghost display; Saimiri; Social facilitation; Social learning; Squirrel monkey
references: J Comp Psychol. 2012 May;126(2):161-9
references: 22468937
references: Philos Trans R Soc Lond B Biol Sci. 2009 Aug 27;364(1528):2405-15
references: 19620111
references: Wiley Interdiscip Rev Cogn Sci. 2010 Sep;1(5):685-695
references: 26271653
references: Am J Primatol. 1992;27(3):177-188
references: 31948136
references: Behav Processes. 2007 Jan 10;74(1):13-20
references: 17049751
references: Behav Processes. 1994 Aug;32(2):173-82
references: 24895980
references: Proc Natl Acad Sci U S A. 2007 Nov 6;104(45):17588-92
references: 17968009
references: Anim Cogn. 2005 Jul;8(3):151-63
references: 15490290
references: Am J Primatol. 1988;16(2):123-130
references: 31968867
references: Anim Behav. 1997 Oct;54(4):817-31
references: 9344436
references: J Comp Psychol. 2003 Dec;117(4):414-9
references: 14717643
references: Anim Cogn. 2009 Sep;12(5):705-16
references: 19455357
references: Anim Behav. 2000 Aug;60(2):195-202
references: 10973721
references: Curr Biol. 2007 Aug 21;17(16):R703-13
references: 17714664
references: Folia Primatol (Basel). 1972;17(3):161-70
references: 5031297
references: J Comp Psychol. 1993 Dec;107(4):380-5
references: 8112050
references: Psychoneuroendocrinology. 1985;10(2):125-34
references: 4034848
references: J Comp Psychol. 1996 Mar;110(1):3-14
references: 8851548
references: Philos Trans R Soc Lond B Biol Sci. 2012 Oct 5;367(1603):2773-83
references: 22927576
references: Proc Biol Sci. 2008 Jan 22;275(1631):187-93
references: 17971322
references: Learn Behav. 2004 Feb;32(1):36-52
references: 15161139
references: Am J Primatol. 2012 Aug;74(8):712-20
references: 22553135
references: Am J Primatol. 2009 May;71(5):419-26
references: 19235756
references: Cereb Cortex. 2013 May;23(5):1014-24
references: 22539611
references: Am J Primatol. 2002 Nov;58(3):133-48
references: 12454957
references: Am J Primatol. 1991;23(1):37-54
references: 31952417
references: Anim Behav. 2000 Jul;60(1):69-76
references: 10924205
references: PLoS One. 2010 May 12;5(5):e10544
references: 20485684
references: Am J Primatol. 1985;9(2):121-127
references: 32102491
references: Philos Trans R Soc Lond B Biol Sci. 2009 Aug 27;364(1528):2417-28
references: 19620112
references: Biol Rev Camb Philos Soc. 2010 Nov;85(4):685-701
references: 20128784
references: Am J Primatol. 2012 May;74(5):442-9
references: 22318867
references: Proc Biol Sci. 2011 Feb 7;278(1704):408-16
references: 20719777
references: Anim Behav. 2011 Jun 1;81(6):1195-1202
references: 27011390
references: Am J Primatol. 2005 Jun;66(2):167-88
references: 15940712
references: Dev Psychol. 2004 Sep;40(5):882-9
references: 15355173
references: J Hum Evol. 2008 Jul;55(1):48-59
references: 18275983
references: Proc Biol Sci. 2007 Feb 7;274(1608):367-72
references: 17164200
references: Learn Behav. 2004 Feb;32(1):24-35
references: 15161138
references: Behav Processes. 2009 Feb;80(2):109-14
references: 18977419
references: Curr Biol. 2007 Jun 19;17(12):1038-43
references: 17555968
references: J Exp Child Psychol. 2010 May;106(1):82-97
references: 20064644
references: J Exp Child Psychol. 2005 Nov;92(3):276-302
references: 16081091
references: Nature. 2005 Sep 29;437(7059):737-40
references: 16113685
references: Proc Biol Sci. 2008 Apr 7;275(1636):835-40
references: 18182368
references: PLoS One. 2009 Nov 18;4(11):e7858
references: 19924242
references: Science. 2004 Jul 16;305(5682):407-10
references: 15256673