"The TFEQ-R18 consists of 18 items on a 4-point response scale (definitely true/mostly true/mostly false/definitely false). Responses to each of the 18 items are given a score between 1 and 4 and item scores are summated into scale scores for cognitive restraint, uncontrolled eating, and emotional eating (see the Appendix) (6,11). The raw scale scores are transformed to a 0–100 scale [((raw score − lowest possible raw score)/possible raw score range) × 100] and the commonly used “half-scale” method is utilized to compensate for missing data on some items. Higher scores in the respective scales are indicative of greater cognitive restraint, uncontrolled, or emotional eating. The mean number of missing values per subject was 0.06 (min–max: 0–2)." From B de Lauzon et al. The Three-Factor Eating Questionnaire-R18 Is Able to Distinguish among Different Eating Patterns in a General Population The Journal of Nutrition Volume 134, Issue 9, September 2004, Pages 2372-2380. I hope this reference helps.