Gravity bias in young and adult chimpanzees (Pan troglodytes): tests with a modified opaque-tubes task.

@article{Tomonaga2007GravityBI,
  title={Gravity bias in young and adult chimpanzees (Pan troglodytes): tests with a modified opaque-tubes task.},
  author={Masaki Tomonaga and Tomoko Imura and Yuu Mizuno and Masayuki Tanaka},
  journal={Developmental science},
  year={2007},
  volume={10 3},
  pages={411-21}
}
Young human children at around 2 years of age fail to predict the correct location of an object when it is dropped from the top of an S-shape opaque tube. They search in the location just below the releasing point (Hood, 1995). This type of error, called a 'gravity bias', has recently been reported in dogs and monkeys. In the present study, we investigated whether young and adult chimpanzees also show such a gravity bias in a modified version of the original opaque-tube task. The original task… CONTINUE READING
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