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. Author manuscript; available in PMC: 2007 May 14.
Published in final edited form as: Neuroscience. 2006 Dec 16;145(2):423–437. doi: 10.1016/j.neuroscience.2006.12.014

Table 2. Behavioral results.

Means and standard errors of CR (seconds of freezing during the first CS presentation minus seconds of freezing during the first pre-CS period) during the post-acquisition (probe I), average CR (seconds of freezing) during the last three tones of extinction training (extinction), and means and standard errors of CR (seconds of freezing during the first CS presentation minus seconds of freezing during the first pre-CS period) during the renewal probe (probe II).

Group Probe I Extinction Probe II
Extinction 12.9 ± 1.44 0.3 ± 0.36 2.4 ± 1.5
Renewal 13.5 ± 0.6 0.12 ± 0.18 12.6 ± 1.5*
Pseudorandom 2.4 ± 1.8* 0.3 ± 0.39 0.3 ± 0.6
*

p < 0.01 significant group differences in probe I, II