Searching for Silva Method papers I have tried to find some papers about Silva Method when that i seen this text in Wikipedia:

James Randi wrote that the Silva Method &quot;claims to develop improved
memory, learning ability, and paranormal powers like telepathy. Much
of the course consists of 'visiting' absent persons imagined by
students and performing diagnoses on them. No tests of the validity of
this practice have been done; such tests are discouraged by the
teachers of the system.&quot;2

so i tried this tags(psychology &quot;Silva&quot;) and not find any paper, So if there is not any paper on silva methods, why does it happen? is it not scientific issue or ...?
James Randi is a famous skeptic who challenges paranormal and pseudoscientific claims. Pseudoscience consists of statements, beliefs, or practices may give the appearance of being scientific, but, are untestable. James Randi's claim is that the Silva method is untestable and, therefore, unscientific.  In other words, the Silva method has no observable (or statistically significant) effect on memory, learning or telepathy.