To determine whether iconic memory has a large capacity, researcher George Sperling needed to

a. compare the performance of participants in the partial-report procedure with those in the whole-report procedure.
b. determine how participants performed in the whole-report procedure.
c. compare the performance of participants in the whole-report procedure with previous studies of memory.
d. compare the performance of participants on iconic memory tasks with the performance of participants on eidetic imagery tasks.

Answer: a. compare the performance of participants in the partial-report procedure with those in the whole-report procedure.