Difficulty, Discrimination, and Information Indices in the Linear Factor Analysis Model for Continuous Item Responses

Autor/in	Ferrando, Pere J.
Titel	Difficulty, Discrimination, and Information Indices in the Linear Factor Analysis Model for Continuous Item Responses
Quelle	In: Applied Psychological Measurement, 33 (2009) 1, S.9-24 (16 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0146-6216
DOI	10.1177/0146621608314608
Schlagwörter	Factor Analysis; Item Response Theory; Discriminant Analysis; Psychometrics; Difficulty Level; Test Items; Causal Models; Maximum Likelihood Statistics; Multidimensional Scaling; Personality Measures; Attitude Measures + Suchen Sie Ihr Suchwort? Faktorenanalyse; Item-Response-Theorie; Diskriminanzanalyse; Psychometry; Psychometrie; Schwierigkeitsgrad; Test content; Testaufgabe; Kausalanalyse; Mehrdimensionale Analysis
Abstract	Spearman's factor-analytic model has been proposed as a unidimensional linear item response theory (IRT) model for continuous item responses. This article first proposes a reexpression of the model that leads to a form similar to that of standard IRT models for binary responses and discusses the item indices of difficulty discrimination and information. Next, the extension to the multiple-factor model is considered, and multidimensional counterparts of the item indices are proposed. The interpretation of the proposed measures and their usefulness in personality and attitude measurement are discussed and illustrated by means of two empirical examples. (Contains 2 tables and 2 figures.) (As Provided).
Anmerkungen	SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10