Why the study?
Does visual feedback improve voluntary control of heart rate in subjects with internal and external locus of control?
Population
40 internal and external locus of control subjects
Comparison
Visual feedback concerning the time interval… vs No visual feedback (first 4 trial pairs)
Design
Other, Order of increase and decrease heart rate conditions counterbalanced…
Authors
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Feedback may enhance voluntary heart rate control with locus-specific effects; hypothesis-generating and should not yet change practice.
Does visual feedback improve voluntary control of heart rate in subjects with internal and external locus of control?
Visual feedback enhances voluntary heart rate control, with internal and external locus of control subjects demonstrating different directional capabilities and strategies.
William J. Ray (1974) studied this question.
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