Behavior Research Methods

, Volume 39, Issue 3, pp 527–530

CTTITEM: SAS macro and SPSS syntax for classical item analysis

Article

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.

References

  1. Assessment Systems Corporation (1989).User’s manual for the ITEMAN conventional item analysis program, version 3.5 for Windows 3.x. St. Paul, MN: Author.Google Scholar
  2. Crocker, L., &Algina, J. (1986).Introduction to classical and modern test theory. New York: Holt, Rinehart & Winston.Google Scholar
  3. Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests.Psychometrika,16, 297–334.CrossRefGoogle Scholar
  4. Ebel, R. L., &Frisbie, D. A. (1991).Essentials of educational measurement (5th ed.) Englewood Cliffs, NJ: Prentice Hall.Google Scholar
  5. Kelley, T. L. (1939). Selection of upper and lower groups for the validation of test items.Journal of Educational Psychology,30, 17–24.CrossRefGoogle Scholar
  6. Levesque, R. (2003, January 27). Syntax for item analysis.SPS. Retrieved May 6, 2006, from www.spsstools.net/Syntax/ItemAnalysis/ SyntaxForItemAnalysis.txt.Google Scholar
  7. Sample 478: Perform item analysis for multiple choice tests (1992, June 26). Retrieved May 6, 2006, from support.sas.com/ctx/ samples/index.jsp?sid 5 478&tab 5 details.Google Scholar
  8. SPSSwhite paper: Using SPSS for item analysis (1998). Retrieved May 6, 2006, from www.spsstools.net/Syntax/ItemAnalysis/UsingSPSSforItemAnalysis.pdf.Google Scholar

Copyright information

© Psychonomic Society, Inc. 2007

Authors and Affiliations

  1. 1.Pennsylvania State UniversityUniversity Park

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