. 2014 Apr 17;9:46. doi: 10.1186/1748-5908-9-46
Copyright © 2014 Jacobs et al.; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
Figure 3.
Example of second order CFA model for group-referenced items.