I got hold of a copy of "
Spiritual Healing: Professional Supplement" which I was told had "proof" that Reiki works. It doesn't. The only "studies" including Reiki were the following:
Page 201-3 - Human Hemoglobin Levels and Reiki
This study purportedly shows Reiki trainees have a higher level of hemoglobin in the blood, compared with non-Reiki people. However, there was no randomization, no blinding for the experimenter (to control for bias), and too small a control group to be meaningful. It is published in the "Journal of Holistic Nursing", which is not a peer reviewed science journal (no scientific journal would publish such a badly designed test). It has not been replicated. There is also a disconnect between this supposed phenomenon and whether Reiki actually heals anyone. So this test tells us nothing about Reiki.
Page 229 - Rheumatoid Arthritis pain treated with Reiki
This was a single blind study with six subjects. Unfortunately, six subjects are nowhere near enough to judge significance. Even the book states that the number of subjects was too small. Single blind tests are always suspect. And it is a Master's Thesis - not published in any peer reviewed journal. So this test also tells us nothing about Reiki.
Page 230 - Idiopathic Pain
Firstly there were only 24 subjects - too small a group. Two people reported healing was successful and four reported some relief, but the book does not note whether they were in the Reiki or the control group (nor, incidentally, does it say what treatments the "control group" received, so we really have no clue as to the protocol of the test). Anyway, the final test result was "no significant differences between treatment and control groups". So this test also tells us nothing about Reiki. (You could say Reiki failed, but the group was actually too small to be meaningful either way.)
Page 232 - Pain Anxiety and Depression
120 patients assigned to one of four groups:
* Reiki
* Progressive muscle relaxation
* Control (ie no treatment)
* False Reiki
Results showed Reiki was "significantly superior". However, the authors listed at least five other variables that could have influenced the results, and so it is hard to form any meaningful conclusion. The study is published in a journal called "Subtle Energies", which (I'm guessing), does not have too strict a peer review policy. And no replication. So this test also tells us nothing about Reiki.
Page 284 - Reiki and Electrodermal activity
This was a distance healing project to see if skin resistance could be altered by a practitioner. Even the book calls this "seriously flawed", noting that no healing effects were noted, so I'm not really sure what it's doing in the book. This test also tells us nothing about Reiki.
Page 280 - Summary of a Master's thesis
This compared TT, herbal therapies, Reiki and acupuncture. States that Reiki was the least helpful, whatever that means. It is impossible from the book to tell what tests were actually done so this test also tells us nothing about Reiki.
That was it.