TY - JOUR
T1 - Navigating two-dimensional mazes
T2 - Chimpanzees (Pan troglodytes) and capuchins (Cebus apella sp.) profit from experience differently
AU - Fragaszy, Dorothy M.
AU - Kennedy, Erica
AU - Murnane, Aeneas
AU - Menzel, Charles
AU - Brewer, Gene
AU - Johnson-Pynn, Julie
AU - Hopkins, William
N1 - Funding Information:
Acknowledgments We thank James Fuller for developing the original maze presentation software, Emil Menzel for development of the pixel tracking program, and the UGA Instrument Shop for the creation of our testing apparatus. We thank Liz Hirsch, Amy Venable, Monique Dase, Jacqueline Montoya, Dayana Atalah, and Katie Leighty for assistance in testing the monkeys, and Carrie Rosengart, Jinae Lee and Jaxx Reeves for aid in statistical analysis. We thank our anonymous reviewers for careful comments which substantially improved this manuscript. This work was supported by HD06016, HD38051, and MH58855 from the National Institutes of Health (USA) and SBR-9729485 from the National Science Foundation to Georgia State University, and the University of Georgia. This study complied with all laws regulating animal care and use in the United States.
PY - 2009/5
Y1 - 2009/5
N2 - We examined whether navigation is impacted by experience in two species of nonhuman primates. Five chimpanzees (Pan troglodytes) and seven capuchin monkeys (Cebus apella) navigated a cursor, using a joystick, through two-dimensional mazes presented on a computer monitor. Subjects completed 192 mazes, each one time. Each maze contained one to five choices, and in up to three of these choices, the correct path required moving the cursor away from the Euclidean direction toward the goal. Some subjects completed these mazes in a random order (Random group); others in a fixed order by ascending number of choices and ascending number of turns away from goal (Ordered group). Chimpanzees in both groups performed equivalently, demonstrated fewer errors and a higher rate of self-correcting errors with increasing experience at solving the mazes, and made significantly fewer errors than capuchin monkeys. Capuchins were more sensitive to the mode of presentation than chimpanzees; monkeys in the Ordered group made fewer errors than monkeys in the Random group. However, capuchins' performance across testing changed little, and they remained particularly susceptible to making errors when the correct path required moving away from the goal. Thus, these two species responded differently to the same spatial challenges and same learning contexts. The findings indicate that chimpanzees have a strong advantage in this task compared to capuchins, no matter how the task is presented. We suggest that differences between the species in the dynamic organization of attention and motor processes contribute to their differences in performance on this task, and predict similar differences in other tasks requiring, as this one does, sustained attention to a dynamic visual display and self-produced movements variably towards and away from a goal.
AB - We examined whether navigation is impacted by experience in two species of nonhuman primates. Five chimpanzees (Pan troglodytes) and seven capuchin monkeys (Cebus apella) navigated a cursor, using a joystick, through two-dimensional mazes presented on a computer monitor. Subjects completed 192 mazes, each one time. Each maze contained one to five choices, and in up to three of these choices, the correct path required moving the cursor away from the Euclidean direction toward the goal. Some subjects completed these mazes in a random order (Random group); others in a fixed order by ascending number of choices and ascending number of turns away from goal (Ordered group). Chimpanzees in both groups performed equivalently, demonstrated fewer errors and a higher rate of self-correcting errors with increasing experience at solving the mazes, and made significantly fewer errors than capuchin monkeys. Capuchins were more sensitive to the mode of presentation than chimpanzees; monkeys in the Ordered group made fewer errors than monkeys in the Random group. However, capuchins' performance across testing changed little, and they remained particularly susceptible to making errors when the correct path required moving away from the goal. Thus, these two species responded differently to the same spatial challenges and same learning contexts. The findings indicate that chimpanzees have a strong advantage in this task compared to capuchins, no matter how the task is presented. We suggest that differences between the species in the dynamic organization of attention and motor processes contribute to their differences in performance on this task, and predict similar differences in other tasks requiring, as this one does, sustained attention to a dynamic visual display and self-produced movements variably towards and away from a goal.
KW - Attention
KW - Learning
KW - Memory
KW - Planning
KW - Spatial problem-solving
KW - Species differences
KW - Vigilance
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UR - http://www.scopus.com/inward/citedby.url?scp=67349134192&partnerID=8YFLogxK
U2 - 10.1007/s10071-008-0210-z
DO - 10.1007/s10071-008-0210-z
M3 - Article
C2 - 19148688
AN - SCOPUS:67349134192
SN - 1435-9448
VL - 12
SP - 491
EP - 504
JO - Animal Cognition
JF - Animal Cognition
IS - 3
ER -