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Objective: To validate a Spanish-language questionnaire on adolescent eating behavior based on Social Cognitive Theory., Design: The validity (reliability and construct validity) of a self-administered questionnaire containing 28 questions with Likert scale-type response options was evaluated., Setting: School located in Tonala, Jalisco, Mexico (a peri-urban area) with approximately 1,400 students enrolled., Participants: One hundred fifty-two adolescents enrolled in the second year of a middle school in Tonalá, Jalisco, Mexico (mean age, 13.7 years; SD, 0.5 years; 64% female). The retest was completed by 70 adolescents chosen at random., Outcome Measures and Analysis: The questionnaire's reliability was measured through internal consistency (Cronbach α) and reproducibility (intraclass correlation coefficient [ICC]). Construct validity was assessed using exploratory factor analysis., Results: Five questions were eliminated from the questionnaire because of a lack of temporal stability (ICC ≤0.4). The exploratory factor analysis was satisfactory for 3 factors (41.89% of variance): environmental facilitators and social support, self-efficacy and self-regulation, and outcome expectations and outcome expectations value. The questionnaire had good internal consistency (α = 0.824) and excellent temporal stability (ICC = 0.849)., Conclusions and Implications: The results substantiate the reliability and construct validity of this questionnaire. The questionnaire has the potential to use the assessment of Social Cognitive Theory constructs in clinical practice or in nutrition interventions aimed at modifying the eating habits of Spanish-speaking adolescents., (Copyright © 2020 Society for Nutrition Education and Behavior. Published by Elsevier Inc. All rights reserved.)

Objective: To provide evidence of the construct validity of a single-item overall diet question with a nomological network of self-rated and biometric measures of dietary intake and outcomes., Methods: The authors conducted a secondary analysis of survey and biometric data from a cross-sectional sample of urban-dwelling adults. In addition to self-rated diet quality, they examined dietary behaviors, biomarkers of intake, and related outcomes. Self-rated diet quality was treated as a continuous variable to calculate P for trend using regression analysis., Results: Self-rated diet quality was significantly associated with variation in both subjective and objective measures of dietary intake (fruit and vegetable intake, P < .001; sugar-sweetened beverage intake, P < .001; sodium to potassium ratio, P < .001), behavior (frequency of fast-food dining, P < .001), and related outcomes (systolic blood pressure, P = .010; diastolic blood pressure, P < .001; and body mass index, P < .001)., Conclusions and Implications: Evidence supports the construct validity of a single-item measure of diet quality. This single-item question may be a useful proxy for more burdensome measures of overall diet quality., (Copyright © 2015 Society for Nutrition Education and Behavior. Published by Elsevier Inc. All rights reserved.)

Low literacy skills and poor evaluation tool readability combined with the stresses of the classroom environment create a high cognitive load for Expanded Food and Nutrition Education Program (EFNEP) participants, resulting in lower quality data. The authors advocate for 9 strategies for improving the participant cognitive load for the evaluation process using the EFNEP Family Record as an example., (Copyright © 2014 Society for Nutrition Education and Behavior. Published by Elsevier Inc. All rights reserved.)

Objective: To develop a brief questionnaire to assess dietary fat quality, the Dietary Fat Quality Assessment (DFQA), for use in dietary counseling to reduce heart disease risk., Methods: A subsample of 120 underserved, midlife women enrolled in a randomized, controlled weight loss trial completed baseline and follow-up telephone surveys. Main outcome measures included dietary fat components (total fat, saturated fat, polyunsaturated fat, monounsaturated fat, omega-3 fatty acids, and cholesterol)., Results: Assessments of major dietary fat components using the DFQA and a food frequency questionnaire were significantly correlated, with correlation coefficients of 0.54-0.66 (P < .001). Intra-class correlation coefficients to assess reliability ranged from 0.48 to 0.59 for each of the fat components studied., Conclusions and Implications: The DFQA provides a reasonable assessment of dietary fat quality associated with coronary heart disease risk and may prove useful as a brief assessment tool to guide dietary counseling given to reduce heart disease risk., (Copyright © 2013 Society for Nutrition Education and Behavior. Published by Elsevier Inc. All rights reserved.)

Objective: The goal of the study was to assess the validity and feasibility of a digital diet estimation method for use with preschool children in Head Start., Methods: Preschool children and their caregivers participated in validation (n = 22) and feasibility (n=24) pilot studies. Validity was determined in the metabolic research unit using actual gram weight measurements as the reference method. Feasibility of using the digital diet estimation method was determined in Head Start and in the home by assessing 3 separate lunch and dinner meals., Results: The average correlation between estimated weights and actual weights was 0.96 (P < .001), and the average mean difference was 10.6 g. The digital diet estimates were 5% lower than the actual weights., Conclusions and Implications: The digital diet estimation method may be a valid and feasible method for assessing food intake of preschool children., (Published by Elsevier Inc.)