I am especially interested in clarifying whether variables such as duration of illness, duration of medication, age at onset, hospitalization, number of depressive episodes etc. can be suggested as possible moderators for the relationship between depressiveness (BDI score) and different declarative memory functions in clinically depressed patients. Additionally, I am not quite sure whether to perform a moderation analysis instead of a mediation analysis and if it is a commonly accepted method of choise for this issue.