title: Video-recorded participant behaviours: the association between food choices and observed behaviours from a web-based diet history interview.
abstract: BACKGROUND
  Automation of dietary assessments allows participant behaviour to be captured by video observation. It also allows clinicians to identify areas that effect reporting accuracy. The present observational study describes the differences in behaviour according to the type of foods selected by participants using a dietary assessment website encompassing diet history methodology.
  
  
  METHODS
  Eleven free-living adults with type 2 diabetes mellitus were video recorded while using a dietary assessment website in a laboratory setting. Significant observable events were identified using TRANSANA software and matched for time of occurrence with grouped food item selections from the website. The frequency and proportion of behaviour types per food group were calculated and trends of associations between food groups and observed behaviour type were determined using weighted chi-square analyses.
  
  
  RESULTS
  Sixteen categories of observed behaviour type were constructed from 7724 significant observable events. The food groups with the highest percentage of observed behaviour types were savoury sauces (7.66%), takeaways (6.47%), sugary foods (6.27%), fats and oils (5.93%), and alcoholic beverages (5.93%), which are all socially undesirable food groups. Self-touching of the face, head movement, postural movement and movement in the chair were observed significantly more often than other observed behaviour types across all food groups.
  
  
  CONCLUSIONS
  Behaviours related to the reporting of foods during a dietary assessment may have significant implications for dietary practice.
authors.affiliation: Smart Foods Centre, School for Health Sciences, University of Wollongong, Wollongong, NSW, Australia. yasmine@uow.edu.au
authors.forename: Y C
authors.initials: YC
authors.lastname: Probst
authors.forename: K
authors.initials: K
authors.lastname: De Agnoli
authors.forename: M
authors.initials: M
authors.lastname: Batterham
authors.forename: L
authors.initials: L
authors.lastname: Tapsell
mesh_terms: D001519:Behavior / Q000502:physiology*; D016009:Chi-Square Distribution; D002755:Choice Behavior; D003924:Diabetes Mellitus, Type 2 / Q000523:psychology; D004034:Diet Surveys; D005247:Feeding Behavior / Q000523:psychology*; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D015596:Nutrition Assessment; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*; D014741:Video Recording