Page "Source amnesia" Paragraph 13

Depression is associated with overly generalized memories and individuals with depression perform more poorly on source memory attribution tasks as compared to non-depressed individuals.

These individuals show a memory bias for remembering negative information, possibly due to enhanced amygdala activity during the encoding of emotional ( particularly negative ) information.

Overall, there is a relationship between the emotional arousal of an episode and its source memory – there is some evidence that the enhanced processing of negative memories results in poorer source memory, and thus individuals who are depressed would have increased amounts of source amnesia.