Chapter 5. Multi-Item Scales

  1. Peter M. Fayers1,2,
  2. David Machin3,4,5

Published Online: 27 APR 2007

DOI: 10.1002/9780470024522.ch5

Book Title

Quality of Life: The Assessment, Analysis and Interpretation of Patient-Reported Outcomes, Second edition

Quality of Life: The Assessment, Analysis and Interpretation of Patient-Reported Outcomes, Second edition

Additional Information

How to Cite

Fayers, P. M. and Machin, D. (2007) Multi-Item Scales, in Quality of Life: The Assessment, Analysis and Interpretation of Patient-Reported Outcomes, Second edition, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9780470024522.ch5

Author Information

  1. 1

    University of Aberdeen Medical School, Scotland, UK

  2. 2

    Norwegian University of Science and Technology (NTNU), Trondheim, Norway

  3. 3

    Division of Clinical Trials and Epidemiological Sciences, National Cancer Centre, Singapore

  4. 4

    School of Health and Related Research, University of Sheffield, England

  5. 5

    United Kingdom Children's Cancer Study Group (UKCCSG), University of Leicester, England

Publication History

  1. Published Online: 27 APR 2007
  2. Published Print: 2 MAR 2007

ISBN Information

Print ISBN: 9780470024508

Online ISBN: 9780470024522

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CHAPTER TOOLS

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Keywords:

  • QoL instruments and multi-item scales;
  • assessing internal consistency or multi-item scale reliability;
  • correlation coefficients;
  • convergent and discriminant validity;
  • Multitrait–multimethod (MTMM) analysis;
  • Cronbach's α and internal consistency;
  • standard error of measurement (SEM);
  • ANOVA and estimating SEM

Summary

This chapter contains sections titled:

  • Introduction

  • Significance tests

  • Correlations

  • Construct validity

  • Cronbach's α and internal consistency

  • Implications for causal items

  • Conclusions

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