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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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. As discussed by Garcia-Perez and Peli, departures from DeVries-Rose behavior (i.e., a slope of 0.5 in log-log coordinates) are clearly apparent in many empirical data bearing on this issue, leading us to question the validity of the DeVries-Rose law for sine-wave gratings.