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. 2016 Mar 31;14:53. doi: 10.1186/s12955-016-0450-6

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© Langer et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Confirmatory Factor Analysis of the one-factor model with 5 items. Residual variances are shown in the small circles on the right. Note* The oval represents the unique factor and the rectangles represent the five different items. The residual variances are shown in the small circles on the right