Most researchers also agree on the importance of individual attitudes and preferences to ward music and its effectiveness in relaxation processes. While individual physiological responses to musical stimuli will likely vary, musical stimuli perceived by the individual as pleasant and relaxing may best enhance the physiological and psychological processes of relaxation (Davis & Thaut, 1989). At the same time, however, the client's preferred relaxation music may not elicit the best physiological response. In such a case, Saperston (1989) successfully modified a client's music preference to facilitate more relaxed responding. He observed that clients who initially achieved lower EMG levels with preferred 'stimulative' music, eventually attained considerably lower EMG levels with 'sedative' music.