NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ826381
Record Type: Journal
Publication Date: 2009
Pages: 16
Abstractor: As Provided
Reference Count: 47
ISSN: ISSN-0146-6216
Difficulty, Discrimination, and Information Indices in the Linear Factor Analysis Model for Continuous Item Responses
Ferrando, Pere J.
Applied Psychological Measurement, v33 n1 p9-24 2009
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.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A