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Originally Posted by eyemsougly 
The problem with meta analysis of psi experiments is we don't really know the quality of those experiments.
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The way it says to address quality of studies in a meta-analysis is to identify high quality studies and low quality studies and then see if effect is smaller in the high quality studies. This will work if some studies considered the particular issue you think is a flaw.
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The post Hyman Honorton communique ganzfeld seemed to have solved that (significant 31% hit rate from 86 to 99) but upon the introduction of stricter standards in 2000 the hit rates declined to a non significant 27%.
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How were the controls tightened?
What were the flaws in the previous studies?
Do you have a link or other reference with more infomation about this?
Thanks,