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2. Detecting multidimensionality: Which residual data-type works best?;Linacre;J Outcome Meas,1998
3. Reliability separation, and strata: Percentage of sample in each level;Linacre;Rasch Meas Trans,2013
4. Data variance: Explained, modeled and empirical;Linacre;Rasch Meas Trans,2003
5. J.M. Linacre Dimensionality: Contrasts and variances Win-steps Manual. 2011 http://www.winsteps.com/winman/index.htm?principalcomponents.htm