caa a22 4500 605541965 CHVBK 20210128100919.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10071-015-0893-x doi (NATIONALLICENCE)springer-10.1007/s10071-015-0893-x Perception of chasing in squirrel monkeys ( Saimiri sciureus ) [Elektronische Daten] [Takeshi Atsumi, Yasuo Nagasaka] Understanding the intentions of others is crucial in developing positive social relationships. Comparative human and non-human animal studies have addressed the phylogenetic origin of this ability. However, few studies have explored the importance of motion information in distinguishing others' intentions and goals in non-human primates. This study addressed whether squirrel monkeys (Saimiri sciureus) are able to perceive a goal-directed motion pattern—specifically, chasing—represented by two geometric objects. In Experiment 1, we trained squirrel monkeys to discriminate a "Chasing” sequence from a "Random” sequence. We then confirmed that this discrimination transferred to new stimuli ("Chasing” and "Random”) in a probe test. To determine whether the monkeys used similarities of trajectory to discriminate chasing from random motion, we also presented a non-chasing "Clone” sequence in which the trajectories of the two figures were identical. Three of six monkeys were able to discriminate "Chasing” from the other sequences. In Experiment 2, we confirmed humans' recognition of chasing with the stimuli from Experiment 1. In Experiment 3, the three monkeys for which discrimination did not transfer to the new stimuli in Experiment 1 were trained to discriminate between "Chasing” and "Clone” sequences. At testing, all three monkeys had learned to discriminate chasing, and two transferred their learning to new stimuli. Our results suggest that squirrel monkeys use goal-directed motion patterns, rather than simply similarity of trajectory, to discriminate chasing. Further investigation is necessary to identify the motion characteristics that contribute to this discrimination. Springer-Verlag Berlin Heidelberg, 2015 Motion perception nationallicence Animacy nationallicence Goal attribution nationallicence Chasing nationallicence Squirrel monkeys nationallicence Atsumi Takeshi Section of Cognition and Learning, Primate Research Institute, Kyoto University, 484-8506, Inuyama, Aichi, Japan aut Nagasaka Yasuo Laboratory for Adaptive Intelligence, Brain Science Institute, RIKEN, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan aut Animal Cognition Springer Berlin Heidelberg 18/6(2015-11-01), 1243-1253 1435-9448 18:6<1243 2015 18 10071 https://doi.org/10.1007/s10071-015-0893-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-015-0893-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Atsumi Takeshi Section of Cognition and Learning, Primate Research Institute, Kyoto University, 484-8506, Inuyama, Aichi, Japan aut NATIONALLICENCE 700 1- Nagasaka Yasuo Laboratory for Adaptive Intelligence, Brain Science Institute, RIKEN, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/6(2015-11-01), 1243-1253 1435-9448 18:6<1243 2015 18 10071