The impact of extinction timing on pre-extinction arousal and subsequent return of fear

Table 1.

Regression model results

n R2 F df P
Immediate extinction
 Subjective arousal
  Early test 27 0.017 0.444 25 0.511
  Late test 25 <0.001 <0.001 23 0.999
  All subjects 52 0.004 0.194 50 0.661
 Tonic SC
  Early test 24 0.024 0.548 22 0.467
  Late test 20 0.032 0.590 18 0.452
  All subjects 44 0.003 0.125 42 0.726
 Salivary cortisol 24 0.148 3.812 22 0.064
Delayed extinction
 Subjective arousal
  Early test 24 0.062 1.463 22 0.239
  Late test 25 0.005 0.126 23 0.726
  All subjects 49 0.034 1.638 47 0.207
 Tonic SC
  Early test 20 0.178 3.904 18 0.064
  Late test 18 0.164 3.139 16 0.095
  All subjects 38 0.164 7.050* 36 0.012
 Salivary cortisol 23 0.024 0.522 21 0.478

  • (SC) Skin conductance.

  • *P < 0.05.

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