Development of object concepts in macaque monkeys.
One of the most interesting questions in cognitive development is how we acquire and mentally represent knowledge about objects. We investigated the development of object concepts in macaque monkeys. Monkeys viewed trajectory occlusion movies in which a ball followed a linear path that was occluded for some portion of the display while their point of gaze was recorded with a corneal-reflection eye tracker. We analyzed the pattern of eye movements as an indicator of object representation. A majority of eye movements of adult monkeys were anticipatory, implying a functional internal object representation that guided oculomotor behavior. The youngest monkeys lacked this strong internal representation of objects. Longitudinal testing showed that this ability develops over time providing compelling evidence that object concepts develop similarly in monkeys and humans. Therefore, the macaque monkey provides an animal model with which to examine neural mechanisms underlying the development of object representations.
Hall-Haro
Cynthia
C
Center for Neural Science, New York University, 4 Washington Place, Room 809, New York, NY 10003, USA. chh@cns.nyu.edu
Johnson
Scott P
SP
Price
Tracy A
TA
Vance
Jayme A
JA
Kiorpes
Lynne
L
D000367:Age Factors; D000818:Animals; D001288:Attention; D003210:Concept Formation; D005133:Eye Movements; D008254:Macaca nemestrina / Q000523:psychology*; D009039:Motion Perception; D009949:Orientation; D010364:Pattern Recognition, Visual; D010470:Perceptual Masking; D011930:Reaction Time; D013045:Species Specificity