Table 4.
Extinction.
| First trial extinction | Last trial extinction | 2-wayb | Simple main effect | Main effect | χ2a | p | f2 | |||
|---|---|---|---|---|---|---|---|---|---|---|
| SR | PIT | CS+ | 54.76 (17.89) | 48.38 (8.94) | TG × CS | 0.23 | 0.63 | |||
| CS− | 54.60 (18.88) | 48.38 (7.72) | TG × Time | 0.00 | 0.98 | |||||
| PVT | CS+ | 52.91 (11.79) | 47.46 (7.36) | CS × Time | 0.20 | 0.65 | ||||
| CS− | 53.93 (14.05) | 46.82 (5.58) | TG | 0.23 | 0.63 | |||||
| CS | 0.00 | 0.98 | ||||||||
| Time | 54.24 | <.01 | ||||||||
| Shock US Expectancy | PIT | CS+ | 6.48 (3.49) | 1.26 (2.54) | TG × CS | 1.74 | 0.19 | |||
| CS− | 2.81 (3.11) | 0.93 (2.10) | TG × Time | 3.59 | 0.06 | |||||
| PVT | CS+ | 6.60 (3.09) | 0.90 (2.06) | CS × Time | 32.70 | <.01 | 0.11 | |||
| CS− | 3.99 (2.95) | 0.69 (2.03) | CS @ First Trial Extinction | 78.72 | <.01 | |||||
| Time @ CS+ | 241.42 | <.01 | ||||||||
| Time @ CS− | 54.68 | <.01 | ||||||||
| TG | 0.15 | 0.69 | ||||||||
| Self-Report Fear | PIT | CS+ | 4.64 (1.57) | 3.02 (1.47) | TG × CS | 0.98 | 0.32 | |||
| CS− | 3.10 (1.69) | 2.95 (1.61) | TG × Time | 0.37 | 0.55 | |||||
| PVT | CS+ | 4.41 (1.74) | 3.16 (1.61) | CS × Time | 19.65 | <.01 | 0.07 | |||
| CS− | 2.75 (1.79) | 2.61 (1.54) | ||||||||
| CS @ First Trial Extinction | 62.11 | <.01 | ||||||||
| Time @ CS+ | 48.69 | <.01 | ||||||||
| TG | 0.72 | 0.40 | ||||||||
Note: TG = Training Group, CS+ is the conditional stimulus associated with the unconditional stimulus (US) during acquisition but not extinction, CS− is associated with the absence of the US, and SR is startle reflex.
a
Degrees of freedom for all analyses = 1.
b
There were no significant 3-way interactions.