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. Author manuscript; available in PMC: 2009 Sep 1.
Published in final edited form as: Neurosci Biobehav Rev. 2008 Jun 5;32(7):1218–1227. doi: 10.1016/j.neubiorev.2008.06.001

Table 2.

Summary of percent freezing (Mean ± SE) in the auditory fear acquisition and retention test based on raw data shown in Fig. 4.

Acquisition test
Trials

1 2 3
1st min
  CS control 0.0 ± 0.0 1.0 ± 1.0 1.8 ± 1.0
  US control 0.0 ± 0.0 22.8 ± 5.7 37.5 ± 13.0
  CS-US association 0.8 ± 0.8 53.3 ± 11.3 50.0 ± 8.3
2nd min
  CS control 0.0 ± 0.0 5.0 ± 3.8 4.0 ± 3.0
  US control 51.6 ± 11.7 65.0 ± 11.7 66.7 ± 13.3
  CS-US association 78.3 ± 10.0 90.0 ± 3.3 68.3 ± 10.0
Retention test
Pre-clicks Post-clicks

CS control 0.4 ± 0.4 2.7 ± 1.6
US control 2.3 ± 1.1 2.2 ± 1.8
CS-US association 5.0 ± 1.7 41.9 ± 10.7***
***

P<0.001, significantly different from CS and US control groups.