The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis

• DOI: 10.1186/s12970-017-0182-y
• Publication Date: 2017-08-03T12:37:42Z
• Authors: Gina Louise Trakman; Adrienne Forsyth; Russell Hoye; Regina Belski
• Keywords: Sports nutrition; Face validity; Clinical nutrition; Classical test theory; Nutrition Education; Content Validity

Appropriate dietary intake can have a significant influence on athletic performance. There is growing consensus sports nutrition and professionals working with athletes often provide education. However, due to the limitations of existing knowledge questionnaires, previous reports athletes' may be inaccurate.An updated questionnaire has been developed based recent review guidelines. The tool validated using robust methodology that incorporates relevant techniques from classical test theory (CTT) Item response (IRT), namely, Rasch analysis.The final 89 questions six sub-sections (weight management, macronutrients, micronutrients, nutrition, supplements, alcohol). content face validity confirmed feedback expert dietitians university students, respectively. internal reliability as whole high (KR = 0.88), most achieved an acceptable reliability. Construct confirmed, independent T-test revealing (p < 0.001) difference in scores (64 ± 16%) non-nutrition students (51 19%). Test-retest assured, strong correlation (r 0.92, p between individuals' two attempts test, 10 days 2 weeks apart. Three fit Unidimensional Model.The version represents improvement over tools. Each sub-section unidimensional, therefore researchers practitioners use these individually, required. Use will allow draw conclusions about effectiveness education programs, differences across varying ages, genders, calibres.