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Blackmore’s observations of direct tampering with the results in one lab and the fact that duplicate experiments failed to produce the same findings in fact they produced the expected 25% hit rate that chance alone predicts.


This was one particular experimenter she was observing, out of dozens of experiments done by different people. What's more, the full story doesn't seem to be entirely clear. I found this conversation on the subject; it makes an interesting read.

I would not use Blackmore for an appeal to authority. Her track record as an experimenter isn't a shining one, and like other skeptics of this kind, she approaches anything with the preconceived notion that paranormal phenomena do not exist. In my book that's as bad as openly believing everything everybody tells you. In bewteen lies true open-minded skepticism.

Can I ask what your source is for the 25% hit rate due to chance? This is new to me.