The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis
Background Appropriate dietary intake can have a significant influence on athletic performance. There is a growing consensus on sports nutrition and professionals working with athletes often provide dietary education. However, due to the limitations of existing sports nutrition knowledge questionnai...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-08-01
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| Series: | Journal of the International Society of Sports Nutrition |
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| Online Access: | http://dx.doi.org/10.1186/s12970-017-0182-y |
| _version_ | 1797685049402851328 |
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| author | Gina Louise Trakman Adrienne Forsyth Russell Hoye Regina Belski |
| author_facet | Gina Louise Trakman Adrienne Forsyth Russell Hoye Regina Belski |
| author_sort | Gina Louise Trakman |
| collection | DOAJ |
| description | Background Appropriate dietary intake can have a significant influence on athletic performance. There is a growing consensus on sports nutrition and professionals working with athletes often provide dietary education. However, due to the limitations of existing sports nutrition knowledge questionnaires, previous reports of athletes’ nutrition knowledge may be inaccurate. Methods An updated questionnaire has been developed based on a recent review of sports nutrition guidelines. The tool has been validated using a robust methodology that incorporates relevant techniques from classical test theory (CTT) and Item response theory (IRT), namely, Rasch analysis. Results The final questionnaire has 89 questions and six sub-sections (weight management, macronutrients, micronutrients, sports nutrition, supplements, and alcohol). The content and face validity of the tool have been confirmed based on feedback from expert sports dietitians and university sports students, respectively. The internal reliability of the questionnaire as a whole is high (KR = 0.88), and most sub-sections achieved an acceptable internal reliability. Construct validity has been confirmed, with an independent T-test revealing a significant (p < 0.001) difference in knowledge scores of nutrition (64 ± 16%) and non-nutrition students (51 ± 19%). Test-retest reliability has been assured, with a strong correlation (r = 0.92, p < 0.001) between individuals’ scores on two attempts of the test, 10 days to 2 weeks apart. Three of the sub-sections fit the Rasch Unidimensional Model. Conclusions The final version of the questionnaire represents a significant improvement over previous tools. Each nutrition sub-section is unidimensional, and therefore researchers and practitioners can use these individually, as required. Use of the questionnaire will allow researchers to draw conclusions about the effectiveness of nutrition education programs, and differences in knowledge across athletes of varying ages, genders, and athletic calibres. |
| first_indexed | 2024-03-12T00:38:45Z |
| format | Article |
| id | doaj.art-fa00fbde48e54802a03b881f598779eb |
| institution | Directory Open Access Journal |
| issn | 1550-2783 |
| language | English |
| last_indexed | 2024-03-12T00:38:45Z |
| publishDate | 2017-08-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of the International Society of Sports Nutrition |
| spelling | doaj.art-fa00fbde48e54802a03b881f598779eb2023-09-15T09:19:29ZengTaylor & Francis GroupJournal of the International Society of Sports Nutrition1550-27832017-08-0114110.1186/s12970-017-0182-y12129995The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysisGina Louise Trakman0Adrienne Forsyth1Russell Hoye2Regina Belski3Department of Rehabilitation, Nutrition and Sport, School of Allied Health, College of Science, Health and EngineeringDepartment of Rehabilitation, Nutrition and Sport, School of Allied Health, College of Science, Health and EngineeringDepartment of Management and Marketing, La Trobe Business School, College of Arts, Social Sciences and CommerceDepartment of Rehabilitation, Nutrition and Sport, School of Allied Health, College of Science, Health and EngineeringBackground Appropriate dietary intake can have a significant influence on athletic performance. There is a growing consensus on sports nutrition and professionals working with athletes often provide dietary education. However, due to the limitations of existing sports nutrition knowledge questionnaires, previous reports of athletes’ nutrition knowledge may be inaccurate. Methods An updated questionnaire has been developed based on a recent review of sports nutrition guidelines. The tool has been validated using a robust methodology that incorporates relevant techniques from classical test theory (CTT) and Item response theory (IRT), namely, Rasch analysis. Results The final questionnaire has 89 questions and six sub-sections (weight management, macronutrients, micronutrients, sports nutrition, supplements, and alcohol). The content and face validity of the tool have been confirmed based on feedback from expert sports dietitians and university sports students, respectively. The internal reliability of the questionnaire as a whole is high (KR = 0.88), and most sub-sections achieved an acceptable internal reliability. Construct validity has been confirmed, with an independent T-test revealing a significant (p < 0.001) difference in knowledge scores of nutrition (64 ± 16%) and non-nutrition students (51 ± 19%). Test-retest reliability has been assured, with a strong correlation (r = 0.92, p < 0.001) between individuals’ scores on two attempts of the test, 10 days to 2 weeks apart. Three of the sub-sections fit the Rasch Unidimensional Model. Conclusions The final version of the questionnaire represents a significant improvement over previous tools. Each nutrition sub-section is unidimensional, and therefore researchers and practitioners can use these individually, as required. Use of the questionnaire will allow researchers to draw conclusions about the effectiveness of nutrition education programs, and differences in knowledge across athletes of varying ages, genders, and athletic calibres.http://dx.doi.org/10.1186/s12970-017-0182-ynutrition knowledgesports nutritionquestionnairemeasurevalidclassical test theoryrasch analysis |
| spellingShingle | Gina Louise Trakman Adrienne Forsyth Russell Hoye Regina Belski The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis Journal of the International Society of Sports Nutrition nutrition knowledge sports nutrition questionnaire measure valid classical test theory rasch analysis |
| title | The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis |
| title_full | The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis |
| title_fullStr | The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis |
| title_full_unstemmed | The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis |
| title_short | The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and Rasch analysis |
| title_sort | nutrition for sport knowledge questionnaire nskq development and validation using classical test theory and rasch analysis |
| topic | nutrition knowledge sports nutrition questionnaire measure valid classical test theory rasch analysis |
| url | http://dx.doi.org/10.1186/s12970-017-0182-y |
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