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Markus, Keith A. – Measurement: Interdisciplinary Research and Perspectives, 2008
A theoretical variable such as integrity, conscientiousness, or academic honesty may correspond to either a construct or a concept, but the standard idiom does not distinguish the two. One can describe the difference between constructs and concepts in terms of set theory. Constructs extend over actual cases, whereas concepts extend over both…
Descriptors: Concept Mapping, Integrity, Language Patterns, Psychometrics
Karelitz, Tzur M. – Measurement: Interdisciplinary Research and Perspectives, 2008
What is the nature of latent predictors that facilitate diagnostic classification? Rupp and Templin (this issue) suggest that these predictors should be multidimensional, categorical variables that can be combined in various ways. Diagnostic Classification Models (DCM) typically use multiple categorical predictors to classify respondents into…
Descriptors: Feedback (Response), Item Response Theory, Predictor Variables, Educational Diagnosis