Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Behav Res Methods. 2007 Aug;39(3):527-30.

CTTITEM: SAS macro and SPSS syntax for classical item analysis.

Author information

  • 1Pennsylvania State University, University Park, Pennsylvania 16802, USA. puiwa@psu.edu

Abstract

This article describes the functions of a SAS macro and an SPSS syntax that produce common statistics for conventional item analysis including Cronbach's alpha, item difficulty index (p-value or item mean), and item discrimination indices (D-index, point biserial and biserial correlations for dichotomous items and item-total correlation for polytomous items). These programs represent an improvement over the existing SAS and SPSS item analysis routines in terms of completeness and user-friendliness. To promote routine evaluations of item qualities in instrument development of any scale, the programs are available at no charge for interested users. The program codes along with a brief user's manual that contains instructions and examples are downloadable from suen.ed.psu.edu/-pwlei/plei.htm.

PMID:
17958163
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Loading ...
    Write to the Help Desk