"No doubt you would far prefer that I should hold fast to a moderate theism, and turn relentlessly against anything occult. But I am not concerned to seek any one's favor, and I must suggest to you that you should think more kindly of the objective possibility of thought-transference and therefore also of telepathy. - Sigmund Freud

The following is an excerpt from the Beginning of Upton Sinclairs' Mental Radio, a foreword by Albert Einstein.(The book is about Sinclairs wife who drew sketches that she perceived from someone else)1928

I have read the book of Upton Sinclair with great interest and am convinced that the same deserves the most earnest consideration, not only of the laity, but also of the psychologists by profession. The results of the telepathic experiments carefully and plainly set forth in this book stand surely far beyond those which a nature investigator holds to be thinkable. On the other hand, it is out of the question in the case of conscientious an observer and writer as Upton Sinclair that he is carrying on a conscious deception of the reading world; his good faith and dependability are not to be doubted - Albert Einstein

Next I'll mention something important. The comparison to these sciences and the "normal" sciences.

For instance the Aspirin study conducted that has shown us that it is useful in reducing the risk of heart attacks.
Through the use of meta-analysis.

Their were 25 studies. 5 out of the 25 studies rejected chance with a 99 percent confidence. Considered individually 80% of the studies are failures. But through the use of meta-analysis, that is combining all the studies the overall results show something different. That in fact their is a visible difference between those not taking aspirin and those who do.

The same can be said for evidence of psi.

The ganzfield telepathy experiments, and the continuation auto-ganzfeld show us the same kind of data.

For the Ganzfeld their are 762 sessions split between 25 individual studies. And the overall hit rate was 37% thus 63% of the sessions are failures. The hit rate corresponds to odds against chance of about a trillion to one. 14 out of 25 were not individually successful. When you use the same kind of meta-analysis you will find out that their is a significant event happening.

Too put it in simpler terms. The magnitude of the aspirin effect is small, taking it only reduces the probability of a heart attack by 0.8%. That effect is about ten times smaller than the psi ganzfeld effect found from the 1985 meta-analysis.