Peterson and Johnson (1971) also did a digit span task with a simultaneously performed concurrent task. Peterson and Johnson asked participants to repeat simple words over and over (e.g., “the,” “the,” “the,” “the,” etc.) while they were also supposed to be rehearsing the digits for the digit span task. They found that:
a. participants recalled more digits because the concurrent task stimulated the use of the phonological loop.
b. participants could not simultaneously repeat the word and suppress the digits.
c. participants recalled fewer digits because both tasks occupied the phonological loop.
d. the articulatory suppression prevented the use of the episodic buffer in this task.
Ans: c
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