Figure 1. Training for reaching, grasping, and eating a pellet in front of a cage mate.

(a) Training scene. (b) Learning curve for reaching. Dashed line represents results of linear regression. (c) “Face to face” condition. (d) Occurrence rate for “face to face” condition (blue line). Blue dashed line represents results of linear regression. Green line represents occurrence rate of success-trials. Red line represents occurrence rate of failure-trials. (e) “Not paying attention” condition. (f) Occurrence rate for “not paying attention” condition. Dashed line represents results of linear regression. Error bars in all graphs indicate standard error.