In the S+/S- discrimination training in Exercise 43, each of the following occurred EXCEPT for,
a. the S+ was a series of tones of different frequency.
b. the S- was a tone on.
c. the S+ and S- were different tones.
d. the S+ was a tone on.
a. the S+ was a series of tones of different frequency.
Answer feedback: In S+/S- discrimination training the S+ and S- were tones with different frequencies. Specifically, the S+ was a 2.0 kHz tone and the S- a 2.25 kHz tone.
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