square-root law

square-root law

[′skwer ¦rüt ‚lȯ]
(statistics)
The standard deviation of the ratio of the number of successes to number of trials is inversely proportional to the square root of the number of trials.
References in periodicals archive ?
Contrary to this summary description, Garcia-Perez and Peli (1997) presented results of a literature review indicating (a) that a decreasing range exists past the Weber range at low frequencies, with a significant presence also at intermediate frequencies in some subjects, and (b) that the increase in sensitivity over the nominal DeVries-Rose range seems to depart significantly from the square-root law.