R, simple relaxation; REMG, R + EMG biofeedback; BP, BP biofeedback only; RBP, R + BP; or to an inert Control Group (TA, reading about transactional analysis without skills training). The four Treatment groups showed modest but consistent BP decreases during Phase 2 (p range from .0001 to .01). Control Phase placebo effects matched those in the Control Group (no BP decrease after Baseline). With a two-way mixed ANOVA design, Learning Phase 2 isolated specific effects of behavioral treatments, while the Control Phase 1 with liberal placebo factors potentiated specific effects during regular clinical work.

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