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. 2014 Sep 5;9(9):e103422. doi: 10.1371/journal.pone.0103422

Figure 4. Apparatus used in Study 2.

Figure 4

(A): The apparatus in the No Access position, before the Actor has pulled either of the two handles. (B): The apparatus in the Access position, after the right handle has been pulled by the Actor, which retracts the left handle so that it becomes inaccessible (i.e., it is now impossible for the Actor to move the left Actor bin and left Recipient bin into the Access position). (1a): left Actor bin. (2a): right Actor bin. (1b): left Recipient bin. (2b): right Recipient bin. (1c): left handle. (2c): right handle.