With respect to the movement ratio, what was the critical aspect of the outcome in Stage 4 of Exercise 18 that confirmed the S-S, S-S model?
a. The ratio was near-zero when the light and the tone were presented on separate trials.
b. The ratio was near-zero when the tone was presented but was much higher when the light was presented.
c. The value of the ratio was near-zero when the light was presented but was much higher when the tone was presented.
d. The ratio remained high when the light and the tone were presented on separate trials.
a. The ratio was near-zero when the light and the tone were presented on separate trials.
Answer feedback: The S-S, S-S model predicted that the CR elicited by the tone and the CR elicited by the light would both disappear following the habituation of the UR in Stage 3. The movement ratio results for Stage 4 confirmed this.
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