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The author has proposed and experimentally tested the mood adjustment approach, complementing mood management theory. Participants were placed in an initial mood and led to anticipate different activities after the waiting period. The upcoming activities were either dynamic or lengthy (arousal) and associated with either pleasure or performance (valence), resulting in a 2 × 2 design. During an ostensible waiting period, participants listened to choices of popular music at their will in a computer-aided procedure. This music taken from the Top 30 charts had been evaluated in a pretest for energy and joyfulness as musical qualities in order to create sets of musical selections that were either low or high in these qualities. In the experiment proper, selective exposure to energetic-joyful music as dependent measure was unobtrusively recorded via software. Results regarding self-exposure across time show that …