Figure 2.

Double context re-exposure. Experimental protocol and results. Day 1 (Training session) and Day 3 (Test session) as in Figure 1. Day 2 (Treatment session): Animals twice reexposed for 5 min: first time without VDS and second time, 4 h later, with VDS presentation. Once removed from container for the second time, animals were SAL- or CHX-injected. Symbols and VDS trial (results) on Days 2 and 3 as in Figure 1.