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Focus on psychometrics . Aspects of item analysis
Author(s) -
Ferketich Sandra
Publication year - 1991
Publication title -
research in nursing and health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 85
eISSN - 1098-240X
pISSN - 0160-6891
DOI - 10.1002/nur.4770140211
Subject(s) - psychometrics , psychology , scale (ratio) , applied psychology , clinical psychology , geography , cartography
During the course of instrument development, investigators are faced with the challenge of developing a psychometrically sound instrument that has a minimal number of items or components. Although instrument developers may encounter specific problems in relation to different types of tests, there are three areas of concern that are frequently encountered. These concerns relate to (a) instrument length, (b) scale homogeneity, and (c) instrument sensitivity. The purpose of this article is to discuss selected aspects of item analysis in relationship to these three commonly encountered and interrelated areas of concern.