“…For example, the psychophysiological correlates of meditation are reported to include a wide variety of changes that suggest decreases in arousal, including various EEG changes and decreases in heart rate, blood pressure, respiratory rate, muscle tension, skin conductance, oxygen consumption, carbon dioxide elimination, and arterial blood lactate (see West, 1980). For example, in an extensive review of the progressive relaxation training literature published from 1970 to 1979, in 12 research journals, Hillenberg and Collins (1982) reported that only 1 of 80 studies employed Rotter's I-E Scale as a dependent measure. Borkovec and Sides (1979) reviewed a number of critical procedural variables related to the physiological effects of progressive relaxation.…”