The Major Conclusion of Cohen, Richardson, Klebez, Febbo, and Tucker's

Multiple Choice

The major conclusion of Cohen, Richardson, Klebez, Febbo, and Tucker's (2001) study investigating forearm-muscle tension and feedback on five different schedules is that:

A) Variable schedules produce higher response rates than fixed schedules
B) Changes in physiological responses during biofeedback show that internal responses are operant behaviors
C) Internal responses are highly resistant to external reinforcement
D) Biofeedback is a useful clinical treatment for muscle pain