Which statement differentiates between Multiple Stimulus With Replacement and Without Replacement?

• A. With replacement, the chosen item is returned; without replacement, the item is removed from the set.
• B. With replacement, the chosen item is removed from the set; without replacement, the items are returned.
• C. All items are replaced with new items after each trial
• D. With replacement, the chosen item is rotated out; without replacement, no rotation occurs

Answer: (D)

The key distinction is whether the chosen stimulus stays available for future trials or is removed from the set. With replacement, after selecting a stimulus, you put it back into the pool, so the total number of stimuli remains the same for every trial. Without replacement, once a stimulus is chosen, it’s removed from the pool, so the set size shrinks and that same item can’t be chosen again in that sequence.

The clearest way to state this is: with replacement, the chosen item returns to the pool; without replacement, the chosen item is removed from the pool. The wording about “rotation” is not the standard way to describe this difference.