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Some hypnotherapists offer healings over the internet, whereas some other don't. I'd like to know how successful is hypnosis or hypnotherapy over a distance, for example, over Skype?

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A literature review was conducted Barak et al. (2008) that compared the effectiveness of internet-based psychotherapy in general (not specifically hypnosis). From their abstract, the results indicate that:

The overall mean weighted effect size was found to be 0.53 (medium effect), which is quite similar to the average effect size of traditional, face-to-face therapy.

Following, they

[...] examined interacting effects of various possible relevant moderators of the effects of online therapy, including type of therapy [...], type of outcome measure, time of measurement of outcome (post-therapy or follow-up), type of problem treated, therapeutic approach, and communication modality, among others. A comparison between face-to-face and Internet intervention as reported on in 14 of the studies revealed no differences in effectiveness.

In short, the studies reviewed,

provide strong support for the adoption of online psychological interventions as a legitimate therapeutic activity [...].

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    $\begingroup$ Does the review deal with hypnosis? I skimmed through it but did not find a mention of it $\endgroup$
    – lucianopaz
    Commented May 11, 2017 at 6:48
  • $\begingroup$ @lucianopaz I am not sure it does specifically. I believe the results may be generalizable given that they found no differences even when correcting for type of therapy $\endgroup$ Commented May 12, 2017 at 13:56

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