Though research seemed to show evidence for the existence of mood-dependence in memory, this came into question later on when researchers suggested the results were actually the result of mood congruent memory, a phenomenon in which an individual recalls more information associated with their condition.[13] For example, a person who is asked to learn a list of words while they have a cold might remember more words associated with their illness such as "tissue" or "congestion" when later asked to recall the words learned. Researchers have since been conducting experiments to unearth the truth about mood-dependent memory, though it remains difficult to completely eliminate unreliability from such studies.