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On May 29, 2012, at 9:19 AM, Dean Radin wrote:

Yes, z and p are redundant, but not everyone has a table of z -> p in their head, so both figures are usually provided (at least in psychology articles that's the norm).

> There is no parapsychology experiment that ever reaches 5 sigma

On a per-experiment, systematically repeatable basis that is true. But there are cases where individual PK and precognition experiments have reached this level. And when considered cumulatively several classes of psi experiments (e.g., precognition, telepathy) have gone way beyond 6 sigma.

best wishes,
Dean


On Tue, May 29, 2012 at 9:04 AM, nick herbert <quanta@cruzio.com> wrote:
yes, z should be called something like the "sigma score"
to distinguish it from what I am calling "absolute effect size"
which expresses in a sense how big the effect actually is if there were no "noise".
Also when z and p are presented together
isn't this redundant? isn't one a simple function of the other?