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Updated: May 10, 2026

Qualitative and Quantitative Validation of Tools with Rating Scales Aimed at Assessing the Quality of University Service-Learning
Published on: August 29, 2025
Development and initial validation of a complementary and alternative medicine (CAM) knowledge instrument
Gwen Wyatt1, Alla Sikorskii, Celia E Wills
1College of Nursing, Michigan State University, East Lansing, MI 48824, USA. gwyatt@msu.edu
Background And Purpose:
Many patients with cancer use complementary and alternative medicine (CAM) therapies without essential knowledge to inform their decisions. A CAM knowledge instrument was developed and tested for initial validation.
Methods:
There were 20 items developed and refined via cognitive interviewing. The instrument was mailed to 800 breast cancer survivors, and mailed again 2 weeks later to assess test-retest reliability.
Results:
Exploratory factor analysis (EFA) revealed 13 items forming a unidimensional scale. A 2-factor solution was also plausible. One factor consisted of 7 items on knowledge about specific features of CAM, and a second 6-item factor on knowledge of regulatory issues.
Conclusions:
Based on factor-analytic validity considerations, the 13-item instrument can be used, or the 2 subscales can be used if a more detailed examination of knowledge is desired.
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