Rat’s response to a novelty and increased complexity of the environment resulting from the introduction of movable vs. stationary objects in the free exploration test
Fig 2
Arrangement of objects in the experimental chamber in each experimental setting.
Tunnels marked with * were the see-saw-like tunnels. On the left, the setting during habituation is presented. On the right, the setup during the test days is presented: in the Mov group, two stationary tunnels were replaced by two movable tunnels (zone C). In the MovAdd group, tunnels were added, and the tunnel on the sting was movable (zone C). In the Add group, tunnels were added, and there were no movable tunnels.