The effectiveness of biofeedback has been a subject of controversy because biofeedback __________.
One of the advantages of biofeedback is that it can help to control health problems.
Spanish conquistadors were not concerned with Native American uses of peyote.
All substances that cause altered states are prohibited by governments.
Biofeedback promotes _______________ in order to treat health conditions.
Biofeedback advocates say their treatment can help relieve tension headaches.
Studies investigating the benefits of meditation and biofeedback have shown mixed results.
All drugs that are capable of producing an altered state are illegal.
Mindful meditation should focus on the mental image that brings the most happiness.
When Rodney practices transcendental meditation, he tries to keep an empty mind.
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