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. Author manuscript; available in PMC: 2010 Mar 1.
Published in final edited form as: J Exp Psychol Anim Behav Process. 2010 Jan;36(1):126–136. doi: 10.1037/a0016055

Figure 5.

Figure 5

Design and hypothetical interval representation of Experiment 3. CS1 = a 3-s click train) and CS2 = a 3-s tone, respectively. US = footshock unconditioned stimuli (1.0 mA for 0.5 s) is indicated by black rectangles. The ISI between the termination of CS1 and the onset of CS2 was either 5 s (denoted by large space between the cue CS1 and the cue CS2 representations) or 0 s (denoted by the lack of spaces between the cue CS1 and the cue CS2 representations). The ISI between the termination of the US and the onset of CS2 was 4.5 s. “CR” and “cr” indicate the expectation of robust and weak conditioned response, respectively. Based on the TCH and Miller and Escobar's (2002) retrieval model. The designations “TD” and “DT” refer to the interval arrangement between CS1 and CS2 in Phases 1 and 2 (T = trace and D = delay). “Short” = short retention interval (3 days). “Long” = long retention interval (24 days).