Searching in the middle-Capuchins' (Cebus apella) and bonobos' (Pan paniscus) behavior during a spatial search task.
In this study we show that bonobos and capuchin monkeys can learn to search in the middle of a landmark configuration in a small-scale space. Five bonobos (Pan paniscus) and 2 capuchin monkeys (Cebus apella) were tested in a series of experiments with the expansion test paradigm. The primates were trained to search in the middle of a 4- or 2-landmark configuration, and were then tested with the same configuration expanded. Neither species searched in the middle of the expanded 4-landmark configuration. When presented with a 2-landmark configuration and a constant or variable inter-landmark training distance, the subjects sometimes searched preferentially in the middle of the expanded configuration. We discuss 2 alternative explanations of the results: extracting a middle rule or averaging between different goal-landmark vectors. In any case, compared to adult humans, primates appear highly constrained in their abilities to search in the middle of a configuration of detached landmarks. We discuss some of the factors that may influence the primates' behavior in this task.
Potì
Patrizia
P
Istituto di Scienze e Tecnologie della Cognizione, National Research Council, 00197 Roma, Italy. patrizia.poti@istc.cnr.it
Kanngiesser
Patricia
P
Saporiti
Martina
M
Amiconi
Alessandra
A
Bläsing
Bettina
B
Call
Josep
J
D000818:Animals; D001288:Attention / Q000502:physiology*; D001522:Behavior, Animal; D002428:Cebus / Q000502:physiology*; D005106:Exploratory Behavior; D008297:Male; D019974:Pan paniscus / Q000502:physiology*; D021641:Recognition, Psychology / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D013037:Spatial Behavior / Q000502:physiology*; D014741:Video Recording / Q000379:methods