I am familiar with these experiments. There are fundamental flaws in the methods in which they were carried out. Though they achieved results, those results remain questionable.
The method involved putting one person in a room and depriving them of senses by covering their eyes and putting white noise head phones on. They would speak out saying what they saw. Another person in another room looks at an image and sends out a "telepathic" thought of a certain image.
Then after some time the person being deprived of their senses would have those apparatus removed and look at a series of pictures and try to choose the right one. This was where most of the results came from and a lot of it was purely chance.
There were many issues with proper control
- There was an inherent bias in how they chose subjects. They only chose subjects who believed in ESP among other things.
- The rooms rooms and apparatus made have not provided for a completely sound proof experiment
- There may have been cues given during the picture phase and the pictures may have not been randomized
- They failed to document large parts of the experiment and made assumptions in their statistical gathering (they assumed in any successful result the existence of esp leaving out the probability of chance)
There was fundamentally so many issues with the experiments, that they cannot be seen as sound. When you do these kind of experiments or any experiment for that matter you have to remove all possible external factors. You have to account for all the variables. They simply didn't here.
It's an intriguing experiment, but like others there are holes. I would love for telepathy and other forms of ESP to exist. One wants to think that we have these super abilities hidden away that we can somehow access. It just hasn't been concretely proven yet.