Optional Stopping of (Sub)Martingales

2021 ◽  
pp. 135-149
Author(s):  
Rabi Bhattacharya ◽  
Edward C. Waymire
Keyword(s):  
Optional Stopping

scholarly journals Erratum

1989 ◽  
Vol 12 (1) ◽  
pp. 187-187
Author(s):  
Robyn M. Dawes
Keyword(s):  
Sample Size ◽  
Prior Knowledge ◽  
Negative Correlation ◽  
Effect Size ◽  
Critical Appraisal ◽  
Personal Communication ◽  
Optional Stopping ◽  
Incorrect Assertion ◽  
Z Scores ◽  
Random Generators

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.

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