Sample size requirements for estimating intraclass correlations with desired precision

Stat Med. 2002 May 15;21(9):1331-5. doi: 10.1002/sim.1108.


A method is developed to calculate the approximate number of subjects required to obtain an exact confidence interval of desired width for certain types of intraclass correlations in one-way and two-way ANOVA models. The sample size approximation is shown to be very accurate.

MeSH terms

  • Analysis of Variance*
  • Child
  • Confidence Intervals*
  • Humans
  • Motor Activity / physiology
  • Sample Size*