Figure 5.

The four arm postures of the BBD as viewed through its video camera. The BBD was trained to move its hand consecutively in numerical order to the 4 spots outlined in red. The images show all four arm postures of the BBD. During training, a bright object placed in the hand made the hand positions salient against the dark background (The lighting was increased when these images were taken to provide sufficient contrast to see the arm). During a test for spontaneous recall of the learned sequence, the bright object was removed to eliminate visual input.