Evaluation of Procedures for Adjusting Problem-Discovery Rates Estimated From Small Samples

Research paper written by James R. Lewis "IBM Corporation".

Abstract talen from the paper;

There are 2 excellent reasons to compute usability problem-discovery rates. First, an estimate of the problem-discovery rate is a key component for projecting the required sample size for a usability study. Second, practitioners can use this estimate to calculate the proportion of discovered problems for a given sample size. Unfortunately, smallsample estimates of the problem-discovery rate suffer from a serious overestimation bias.