title: Young adolescents' engagement in dietary behaviour - the impact of gender, socio-economic status, self-efficacy and scientific literacy. Methodological aspects of constructing measures in nutrition literacy research using the Rasch model.
abstract: OBJECTIVE
  The present study validates a revised scale measuring individuals' level of the 'engagement in dietary behaviour' aspect of 'critical nutrition literacy' and describes how background factors affect this aspect of Norwegian tenth-grade students' nutrition literacy.
  
  
  METHODS
  Data were gathered electronically during a field trial of a standardised sample test in science. Test items and questionnaire constructs were distributed evenly across four electronic field-test booklets. Data management and analysis were performed using the RUMM2030 item analysis package and the IBM SPSS Statistics 20 statistical software package.
  
  
  METHODS
  Students responded on computers at school.
  
  
  METHODS
  Seven hundred and forty tenth-grade students at twenty-seven randomly sampled public schools were enrolled in the field-test study. The engagement in dietary behaviour scale and the self-efficacy in science scale were distributed to 178 of these students.
  
  
  RESULTS
  The dietary behaviour scale and the self-efficacy in science scale came out as valid, reliable and well-targeted instruments usable for the construction of measurements.
  
  
  CONCLUSIONS
  Girls and students with high self-efficacy reported higher engagement in dietary behaviour than other students. Socio-economic status and scientific literacy - measured as ability in science by applying an achievement test - did not correlate significantly different from zero with students' engagement in dietary behaviour.
authors: 1Norwegian Centre for Science Education,University of Oslo,Naturfagsenteret,Postboks 1106,Blindern,0317 Oslo,Norway.
authors: Øystein
authors: Ø
authors: Guttersrud
authors: 2Faculty of the Health Sciences,Department of Health,Nutrition and Management,Oslo and Akershus University College of Applied Sciences,Oslo,Norway.
authors: Kjell Sverre
authors: KS
authors: Petterson
mesh_terms: D000293:Adolescent; D004032:Diet; D005260:Female; D057220:Health Literacy; D006801:Humans; D008297:Male; D009664:Norway; D052756:Nutritional Sciences; D011594:Psychometrics; D015203:Reproducibility of Results; D012586:Science; D020377:Self Efficacy; D012737:Sex Factors; D012923:Social Class
keywords: Critical nutrition literacy; Dietary behaviours; Quantitative research; Rasch modelling
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