The most stable of all mood and memory effects is mood-congruent recal
l (Mayer, Gayle, Meehan, & Haarman, 1990). Nevertheless, a variety of
debates surround this effect. One such debate is whether mood-congruen
cy is due to demand characteristics. In the current experiment, 64 par
ticipants experienced mood induction stimuli and were presented with l
earning stimuli identical to the standard Mayer et al. (1990) conditio
n. Unlike Mayer et al. (1990), demand characteristics were controlled
by the use of hypothesis-naive experimenters and limited debriefing to
minimize the seepage of the experimental hypothesis into the targeted
participant pool. Mood-congruent recall was not observed at a statist
ically significant level in this experiment. The most interesting find
ing was evidence which indicated that the mood inductions altered both
degrees of pleasure and arousal. This finding suggests that the two d
imensions have been confounded in previous research. These results, on
ce again, bring into question the validity of the ''mood-congruency''
effect.