In Exercise 41, the DS response strength graph following discrimination training showed both positive and negative response strength at all but the extreme values of the nine levels of tone frequency. If the positive and negative strengths for each stimulus were to be summed, what shape would the resulting curve have?
a. A straight line with a slope of zero
b. A straight line with a slope of 1.0
c. A U-shaped curve with its minimum at 2.0 kHz
d. An inverted U-shaped curve with its maximum at 2.0 kHz
c. A U-shaped curve with its minimum at 2.0 kHz
Answer feedback: The positive DS response strength was about the same for each of the stimuli. The negative DS response strength was lowest at 2.0 kHz. If the response strengths at each frequency were summed, the response strength for 2.0 Hz would be essentially zero, while that for the other stimuli would be greater than zero and would increase the farther they were from 2.0 kHz.
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