Erratum

Extract

In my comments in BBS (Random generators, ganzfields, analysis, and theory, 1987, 10:581-82) regarding psi, I mistakenly ascribed to Professor Honorton the position that "good experimenters knew in advance that the assertion in the paper I cited (1985), and in fact regards it as a rather foolish one (personal communication 6/25/88). This incorrect assertion was based on my inference - not his - that the most plausible alternative to optional stopping for the negative correlation between sample size and effect size (and even z-scores) was prior knowledge leading to the necessity of sampling fewer observations when the expectation of the estimated effect size was larger.

Honorton, C. (1985) The Ganzfeld psi experiment: A critical appraisal. Journal of Parapsychology 49:51-91.