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Rhesus monkeys reason about perspectives of others in obtaining food
Rhesus monkeys consider whether someone can or cannot see them when trying to steal food, indicating they have the
ability to reason about the mental states of others, according to a study published this month in Current Biology.
In each of six experiments, two people stood in front of a platform, each with a grape attached to the platform. The
experiments created competitive conditions, the monkeys were competing with the humans for the grapes.
The 115 monkeys tested only took the grape when they could tell that a person was not looking at them. The experiments varied
from one person looking at the monkey and the other with their back turned, to one person having their eyes covered with
cardboard and the other with only their mouth covered with cardboard.
"What we are interested in is whether monkeys can reason about the mental states of others," said Jonathan Flombaum, a
graduate student in Yale's Department of Psychology and the first author of the study. "Seeing is the most elementary piece
of this. The simplest mental state is perception, what you see."
The experiments were conducted with semi-free-ranging rhesus monkeys on the island of Cayo Santiago in Puerto Rico.
Flombaum said the research could help shed light on the causes of autism. "There are many studies showing that autistic
children don't look at the eyes of others in the ways that other individuals do in the course of social interactions, and
also that autistic children don't use eye gaze information to make social and mental judgments about others," he said.
The senior author was Laurie Santos, an assistant professor at Yale. The research was supported by a National Science
Foundation graduate research fellowship and the Yale University Moore Fund grant.
Current Biology 15: 447-452 (March 8, 2005)
Contact: Jacqueline Weaver
jacqueline.weaver@yale.edu
203-432-8555
Yale University
http://www.yale.edu
Maimuþe rhesus motiv despre perspectivele de alþii în obþinerea de produse alimentare - Rhesus monkeys reason about perspectives of others in obtaining food - articole medicale engleza - startsanatate