Figure 1
From: Middle identification for rhesus monkeys is influenced by number but not extent
Schematic representation of the training procedure and of the training stimuli. Each trial began with the presentation of the catered start response square, (A) a stimulus appeared, in either its far or close version, (B,C) no choice within 5 s elicited a black screen, (D) choices of the lateral dots elicited a grey screen, (E) selection of the middle dot elicit a positive reward, a positive sound and a green screen (F).
