We apply collaborative filtering (CF) to dichotomously scored student response data (right, wrong, or no interaction), finding optimal parameters for each student and item based on cross-validated prediction accuracy. The approach is naturally suited to comparing different models, both unidimensional and multidimensional in ability, including a widely used subset of Item Response Theory (IRT) m...

Item response theory (IRT) is a modeling approach that links responses to test items with underlying latent constructs through formalized statistical models. This article focuses on how IRT can be used advance science and practice in organizations. We describe established applications of as scale development tool new research testing enables organizational researchers improve their understandin...

Item Response Theory (IRT) models enable researchers to evaluate test or survey subjects and questions simultaneously to more accurately judge the difficulty and quality of the test as well as the strength of each subject. Most IRT analyses use parametric models, often without satisfying the necessary assumptions of these models. The KernSmoothIRT package uses kernel smoothing from Ramsay (1991...

Person-fit statistics have been proposed to investigate the fit of an item score pattern to an item response theory (IRT) model. The author investigated how these statistics can be used to detect different types of misfit. Intelligence test data were analyzed using person-fit statistics in the context of the G. Rasch (1960) model and R. J. Mokken's (1971, 1997) IRT models. The effect of the cho...

Short form measures from the Patient Reported Outcomes Measurement Information System® (PROMIS®) are used widely. The present study was among the first to examine differential item functioning (DIF) in the PROMIS Depression short form scales in a sample of over 5000 racially/ethnically diverse patients with cancer. DIF analyses were conducted across different racial/ethnic, educational, age, ge...

OBJECTIVE To describe the cross-cultural adaptation of the Affective Reactivity Index (ARI) to Brazilian Portuguese and to investigate preliminary psychometric properties of the adapted version. METHODS Cross-cultural adaptation was based on the investigation of the theoretical and operational equivalences of the original ARI in the Brazilian context, followed by a process of translation, bac...

The serial position effect shows that two interrelated cognitive processes underlie immediate recall of a supraspan word list. The current study used item response theory (IRT) methods to determine whether the serial position effect poses a threat to the construct validity of immediate list recall as a measure of verbal episodic memory. Archival data were obtained from a national sample of 4,21...