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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: J Psychiatr Res. 2010 Nov 12;45(5):638–649. doi: 10.1016/j.jpsychires.2010.10.010

Figure 4.

Figure 4

The three panels show conditioned responses (CRs) to the tone conditioned stimulus (CS) during six days of CS-unconditioned stimulus (US) pairings (Acquisition), during one (top), three (middle), or six (bottom) subsequent days of unpaired CS/US presentations (Unpaired Extinction) with either a 1-psi (circle), 4-psi (square), or 8-psi (triangle) US, and then a further seven (top), five (middle), or two (bottom) days of unpaired CS/“US” presentations with the 1-, 4, or 8-psi US air puff tubing moved to the front of the chamber and away from the eye (CS Extinction).