Fig. 2.

This graph shows the time spent in each apparatus chamber during initial apparatus exposure and then during the testing period after exposure only to the cues that would have served as conditioned cues in the complete procedure by a control group of dams (n=5) that were never exposed to unconditioned stimulus. It illustrates that exposure to the apparatus without pairing the chambers with the unconditioned stimuli did not induce a conditioning effect. Dark bars pre-conditioning, light bars post-conditioning