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Edwin K. Yager, Ph.D.
Qualifications
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Study of the Success Rates of 73 Patients
Data processing: The data was quantified by assuming each continuum to represent 0-to-10, recording the value marked thereon, and averaging the scores. The averaged before-and-after scores were then evaluated using the Effect Size computation of Cohen’s d and r.
Results:
The results of the study are summarized in Table 1. The overall Cohen’s d is 2.11, r = 0.858, n = 120.
Table 1 -- Effectiveness of Subliminal Therapy
Expansion of the details of the above data, in addition to newly added subjects, is available by request to doc@docyager.com Limitations: The data obtained in this study was derived exclusively from patients who were treated by the author in his private practice. Therefore, the data may not accurately represent the results of treatment by Subliminal Therapy if conducted by others.
While some follow-up data is available, which thus far confirms the results reported above, there has not yet been adequate follow up to validate results. A concerted effort to obtain this data was begun in July 2010.
OTHER THERAPIES
A search was conducted to identify studies that would provide data with which to compare the efficacy of ST with other protocols. Only a few of the studies identified included objective data, most reported in verbal terms with expressions such as “significantly significant improvement.” Table 2 shows the results of those studies that reported data in a comparable form, and serves to provide data for the comparison. Table 2 – Success Rates of Other Therapies
Data on length of treatment by CBT was particularly difficult to identify. As quoted by Gale Thompson on Healthline:, “Like behavior therapy, cognitive behavior therapy tends to be short-term (often between 10 and 20 sessions), …” http://www.healthline.com/galecontent/cognitive-behavior-therapy#cognitivebehaviortherapy
Conclusions:
Subliminal Therapy demonstrates an unusually high Effect Size over an unusually wide range of presenting problems, physical as well as mental. ST demonstrated an overall Effect Size of 2.11 with CBT demonstrating a range of 1.19 TO 1.28. ST is significantly more efficacious than CBT in terms of effectiveness and in efficiency as well.
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Beginning in August of 2008, I have accumulated data to objectively evaluate the effectiveness and efficiency of ST. The data formalized in following paragraphs were derived from patient-completed inventories obtained in my private practice in San Diego, California.
Methods:
Subjects:
The subjects of this study were all patients in my private practice. All 73 patients were adults with a mean age of 38 years, most of whom presented more than one problem. Thirty patients were male, 42 were female. Of the 120 problems reported here, 50 were presented by males and 70 were presented by females. Thirteen patients were excluded from the study because of incomplete treatment.
Procedure:
In each case, the initial session was devoted to history and evaluation, and all subjects were instructed in the self-use of hypnosis. All were provided with a copy of Subliminal Therapy: Utilizing the Unconscious Mind (Yager 1985), and were instructed to read it prior to the next appointment. Subjects were typically seen 1-2 times per week for one-hour sessions and all were treated by ST.
Data collection:
Patients were asked to complete a brief inventory form at the initial session, again at the conclusion of treatment and (currently in execution) as a follow up. The form used was a one-page inventory of the effects the presenting problem was having on the patient’s life. The following questions were asked and the patient was requested to indicate the degree of effect by marking on a continuum representing “Not at all” to “Severe.” In the event more than one problem was presented, a separate form was used for each.
To what extent are the symptoms present in your life?
To what extent has the above problem interfered with your social life?
To what extent has the above problem interfered with your family life?
To what extent has the above problem interfered with your sexual life?
To what extent has the above problem interfered with your spiritual life?
To what extent has the above problem interfered with your memory?
To what extent has the above problem interfered with your sleep?
To what extent has the above problem interfered with your appetite?
To what extent has the above problem interfered with your work life?
To what extent has the above problem interfered with your ability to concentrate?
To what extent has the above problem been a cause of personal distress?
To what extent has the above problem caused you to feel depressed?
To what extent has the above problem caused you to feel anxious?
To what extent has the above problem caused physical problems?
To what extent has the above problem caused any other problem/s?
If your response is affirmative, what is that problem?