Inclusion Criteria:  English-speaking participants Diagnosed by their physician with non-acute (more than two weeks) neck and/or shoulder girdle primary myofascial pain Referred to a physical therapy treatment.  Exclusion Criteria:  In an effort to reduce the potential that another medical condition could lead to a secondary myofascial pain response, extensive comorbid exclusion criterion. Use of chronic high-dose opioid medication greater than 100 mg oral morphine equivalents per day. Individuals receiving or applying for compensation or disability. The inability to provide informed consent. Severe physical impairment (e.g., blindness, deafness) Co-morbid medical condition limiting function (e.g., malignant cancer) Reported illicit drug use Severe psychiatric condition that would limit judgment. Lack of internet access.