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Evaluating the dimensionality of perceived cognitive function.
J Pain Symptom Manage. 2009 Jun;37(6):982-95. doi: 10.1016/j.jpainsymman.2008.07.012.
J Pain Symptom Manage. 2009.
PMID: 19500722
Free PMC article.
Classical test theory and item response theory/Rasch model to assess differences between patient-reported fatigue using 7-day and 4-week recall periods.
Lai JS, Cook K, Stone A, Beaumont J, Cella D.
Lai JS, et al.
J Clin Epidemiol. 2009 Sep;62(9):991-7. doi: 10.1016/j.jclinepi.2008.10.007. Epub 2009 Feb 12.
J Clin Epidemiol. 2009.
PMID: 19216054
Free PMC article.
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simpolycat: an SAS program for conducting CAT simulation based on polytomous IRT models.
Chen SK, Cook KF.
Chen SK, et al.
Behav Res Methods. 2009 May;41(2):499-506. doi: 10.3758/BRM.41.2.499.
Behav Res Methods. 2009.
PMID: 19363190
Free PMC article.
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