Dissociative effects of phonological vs. semantic associates on recognition memory in the Deese/Roediger-McDermott paradigm.

Using a variation of the Deese/Roediger-McDermott paradigm in four experiments, we examined hit rate, false alarm rate, and memory discriminability (d') for critical items (e.g., sleep) after their semantic associates (e.g., dream, rest, and awake), phonological associates (e.g., bleep, sheep, and cheap) or unrelated items were studied. Replicating previous research (e.g., Neely & Tse, 2007), d' was lower for critical items than for yoked associates in semantic lists. However, d' was higher for critical items than for yoked associates in phonological lists, even when the same critical items were used for these two list types. The memory discriminability of critical items was enhanced by phonological lists via a larger increase in their hit rates than in their false alarm rates, relative to the same critical items in lists of unrelated words. These findings (a) could not be fully accounted for by the activation-based theories proposed in the false memory literature, and (b) may suggest that the memory discriminabilities of semantic and phonological lists are modulated by two distinct activation mechanisms.