The fan effect paradigm was used to investigate the influence of emoti
onal mood state on long-term memory retrieval (Anderson, 1983). Subjec
ts learned target facts embedded in unrelated sentences to a specified
criterion and were then given a happy, sad, or neutral mood induction
. Mean response times (RTs) and error rates were analyzed in a speeded
recognition test in which subjects distinguished between the learned
facts and foil facts (foil facts were constructed by recombining the s
ame concepts). A follow-up lexical decision task indicated that mean R
T was positively correlated with an increase in the weighted proportio
n of irrelevant thoughts produced by subjects in an induced sad mood.
Results suggest that irrelevant thoughts associated with the sad mood
state interfered with more relevant, task-oriented, thoughts and suppo
rt the notion that sad mood is related to a failure to inhibit irrelev
ant information.