Viechtbauer, W.
Overview
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 crossspecies experimental model for panic by N. K Leibold(
)
1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide
1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide
Alleiniges Krafttraining und Übungstherapie mit passiver manueller Mobilisation reduzieren Schmerz und Behinderung bei Personen
mit Knieosteoarthritis: Ein systematischer Review(
)
1 edition published in 2012 in German and held by 2 WorldCat member libraries worldwide
1 edition published in 2012 in German 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
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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Related Identities
 Lange, I.
 Leibold, N. K. Author
 Buchanan, G. F.
 de Bie, R. Contributor
 Jansen, M. J. Contributor
 Goossens, L.
 Lesch, K.P.
 Schruers, K. R. J.
 Knuts, I.
 Hove, D. L. A. van den