Figure 3

Two-box choice apparatus. (A) Top-view with the two separated compartments and occluding board (b) in front of the mirror (a). (B) Schematic cross-section of the apparatus with a baited compartment.

Two-box choice apparatus. (A) Top-view with the two separated compartments and occluding board (b) in front of the mirror (a). (B) Schematic cross-section of the apparatus with a baited compartment.