Don't Tie Yourself to an Onion: Don’t Tie Yourself to Assumptions of Normality

Marsman, Maarten and Maris, Gunter and Bechger, Timo (2012) Don't Tie Yourself to an Onion: Don’t Tie Yourself to Assumptions of Normality. In: Psychometrics in practice at RCEC. RCEC, pp. 103-114. ISBN 9789036533744

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Abstract:	A structural measurement model (Adams, Wilson, & Wu, 1997) consists of an item response theory model for responses conditional on ability and a structural model that describes the distribution of ability in the population. As a rule, ability is assumed to be normally distributed in the population. However, there are situations where there is reason to assume that the distribution of ability is nonnormal. In this paper, we show that nonnormal ability distributions are easily modeled in a Bayesian framework
Item Type:	Book Section
Copyright:	© RCEC, Cito/University of Twente, Enschede, Netherlands, 2012
Faculty:	Behavioural Sciences (BS)
Research Group:	Research Methodology, Measurement and Data Analysis (OMD)
Link to this item:	http://purl.utwente.nl/publications/80205
Official URL:	http://dx.doi.org/10.3990/3.9789036533744.ch8
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