A meta-analysis of frontalis EMG levels with biofeedback and alternative procedures |
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Authors: | Christopher F Sharpley H Jane Rogers |
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Institution: | (1) Monash University, Clayton, Victoria, Australia;(2) University of New England, Armidale, N.S.W., Australia |
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Abstract: | The lack of comparative reviews of the efficacy of EMG frontalis biofeedback versus alternative procedures for reduction of muscle tension prompted the present meta-analytic treatment of literature previously concluded to be equivocal. Twenty studies comparing EMG frontalis biofeedback with other tension-reduction procedures produced a total of 68 separate effect sizes suitable for meta-analysis. Differences between clinical and normal samples were nonsignificant, and data analyses revealed that EMG frontalis biofeedback was significantly superior to control (p<.05) but that alternative forms of muscle relaxation, while effective, did not reach statistical significance. |
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