Because the extinction of the CER (Stage 2) proceeded more slowly than its acquisition (Stage 1),
a. the medium-intensity tone was used in both stages.
b. the average interval between trials in both stages remained the same.
c. the suppression ratio provided a better measure of extinction than the movement ratio did.
d. more trials occurred in Stage 2 than in State 1.
d. more trials occurred in Stage 2 than in State 1.
Answer feedback: The CER extinguishes more slowly than it is acquired. For that reason, more extinction trials were scheduled in order to observe the effects of the extinction procedure (presentation of the CS without the US).
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