title: Prediction of daily food intake as a function of measurement modality and restriction status.
abstract: OBJECTIVE
  Research on eating relies on various indices (e.g., stable, momentary, neural) to accurately reflect food-related reactivity (e.g., disinhibition) and regulation (e.g., restraint) outside the laboratory. The degree to which they differentially predict real-world consumption remains unclear. Further, the predictive validity of these indices might vary depending on whether an individual is actively restricting intake.
  
  
  METHODS
  We assessed food craving reactivity and regulation in 46 healthy participants (30 women, 18-30 years) using standard measurements in three modalities: a) self-reported (stable) traits using surveys popular in the eating literature, and b) momentary craving ratings and c) neural activation using aggregated functional magnetic resonance imaging data gathered during a food reactivity-and-regulation task. We then used these data to predict variance in real-world consumption of craved energy-dense "target" foods across 2 weeks among normal-weight participants randomly assigned to restrict or monitor target food intake.
  
  
  RESULTS
  The predictive validity of four indices varied significantly by restriction. When participants were not restricting intake, momentary (B = 0.21, standard error [SE] = 0.05) and neural (B = 0.08, SE = 0.04) reactivity positively predicted consumption, and stable (B = -0.22, SE = 0.05) and momentary (B = -0.24, SE = 0.05) regulation negatively predicted consumption. When restricting, stable (B = 0.36, SE = 0.12) and neural (B = 0.51, SE = 0.12) regulation positively predicted consumption.
  
  
  CONCLUSIONS
  Commonly-used indices of regulation and reactivity differentially relate to an ecologically-valid eating measurement, depending on the presence of restriction goals, and thus have strong implications for predicting real-world behaviors.
authors.affiliation: Department of Psychology (Giuliani, Berkman), University of Oregon, Eugene, Oregon; Department of Psychology (Tomiyama), University of California, Los Angeles, Los Angeles, California; Department of Psychology (Mann), University of Minnesota, Minneapolis, Minnesota.
authors.forename: Nicole R
authors.initials: NR
authors.lastname: Giuliani
authors.forename: A Janet
authors.initials: AJ
authors.lastname: Tomiyama
authors.forename: Traci
authors.initials: T
authors.lastname: Mann
authors.forename: Elliot T
authors.initials: ET
authors.lastname: Berkman
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000502:physiology*; D004435:Eating / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D011897:Random Allocation; D055815:Young Adult