Statistical cross-validation has become an integral part of the model-refinement process in macromolecular crystallography. However, the test set of reflections, for which the free R value is calculated, is used both to optimize the parameterization of the structure model and to validate the model i
Validation of a linked segment model applied to lifting
β Scribed by Michiel P. de Looze; Huub M. Toussaint; Idsart Kingma; Hans J.B. Bussmann
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 142 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0021-9290
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Classical test theory approaches to measurement are based upon a number of fairly restrictive assumptions. The nature of these assumptions is such that scales designed to operationalize latent constructs are treated with little regard for the interaction between the human subject and the items that
## Abstract The protection motivation model has contributed usefully to researchers' understanding of fear appeals in advertising. However, the empirical evidence reported to date in the literature has been mixed. This article proposes and tests a revised model including two segmenting variables as