Chen, W Comparison of sensory modes of biofeedback in relaxation training of frontalis muscle. [electronic resource] - Perceptual and motor skills Dec 1981 - 875-80 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial ISSN: 0031-5125 Standard No.: 10.2466/pms.1981.53.3.875 doi Subjects--Topical Terms: AdultBiofeedback, PsychologyCuesElectromyographyFemaleForeheadHumansMaleMuscle ContractionMuscle RelaxationRandom Allocation