One argument for distinguishing between hard (i.e., low-associate) and
easy (i.e., high-associate) paired-associate learning is that hard as
sociates provide a selective measure of episodic memory, whereas easy
associates reflect both episodic and semantic memory. This study exami
ned correlations between hard and easy verbal paired associates and ep
isodic and semantic memory in a mixed clinical sample. When age and ed
ucation were controlled, hard paired associates correlated as much wit
h category fluency (i.e., semantic memory) as they did with immediate
recall or retention (i.e., episodic memory). Correlations with hard an
d easy associates differed more on retention than on immediate recall.
Letter fluency was essentially unrelated to either easy or hard assoc
iates. The study concludes that hard paired associate learning should
not be presumed to selectively measure episodic memory.