WorldCat Identities

Viechtbauer, W.

Works: 3 works in 3 publications in 2 languages and 5 library holdings
Roles: Contributor, Author
Publication Timeline
Most widely held works by W Viechtbauer
CO2 exposure as translational cross-species experimental model for panic by N. K Leibold( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

A simple formula for the calculation of sample size in pilot studies by W Viechtbauer( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

One of the goals of a pilot study is to identify unforeseen problems, such as ambiguous inclusion or exclusion criteria or misinterpretations of questionnaire items. Although sample size calculation methods for pilot studies have been proposed, none of them are directed at the goal of problem detection. In this article, we present a simple formula to calculate the sample size needed to be able to identify, with a chosen level of confidence, problems that may arise with a given probability. If a problem exists with 5% probability in a potential study participant, the problem will almost certainly be identified (with 95% confidence) in a pilot study including 59 participants
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Audience Level
  Kids General Special  
Audience level: 0.98 (from 0.97 for Alleiniges ... to 1.00 for A simple f ...)