BBC news item
Among the more unusual records are documents from the Stargate Project, which dealt with psychic powers and extrasensory perception.

Those include records of testing on celebrity psychic Uri Geller in 1973, when he was already a well-established performer.

Memos detail how Mr Geller was able to partly replicate pictures drawn in another room with varying - but sometimes precise - accuracy, leading the researchers to write that he "demonstrated his paranormal perceptual ability in a convincing and unambiguous manner"
I've not read this document, but it contains some of the drawings shown in the above article.

Direct document link:
An interesting comment on page 16:
"In these experiments conducted with this shielded room, six day's work was done. Good results were obtained on the four days when there was no openly skeptical observer (except the experimenters whom Geller has learned to accept)."

I suppose a cynical interpretation would be that the protocol or methodology was more casual without the sceptic there to supervise things. However, in the context of the area under investigation, it might be more appropriate to consider whether the mental projection of that person was directly or indirectly involved. A somewhat mundane view might be that there was a sense of unease or discomfort which prevented Geller from relaxing sufficiently to properly carry out the tasks. But given the earlier experiment where that person was not present, but had (unknown to anyone at the time of the experiment) actually drawn the target image, it would not seem that any ordinary means of communication was responsible.

To me it suggests something has probably been suggested before, that when sceptics attempt PSI experiments with poor results, it is the very scepticism which is responsible for generating the outcome: that is, there is still a PSI effect, the sceptic generates results compatible with his/her worldview.