ArticleJornal de pediatria
The conception, content validation, and test-retest reliability of the Questionnaire for Screen Time of Adolescents (QueST).
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12 citing papers in PubMed.
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- Digital exposure and health behaviours in adolescents: a cross-sectional study from South India.Frontiers in pediatrics · 2026Article
- Measuring screen time among adolescents: test-retest reliability of HBSC questionnaire items across two countries.BMC public health · 2025Article
- Threat of coronavirus and depressive symptoms in adolescents: do 24-hour movement behaviors mediate this relationship?BMC public health · 2025Article
- Impact of Elevated Screen Time on School-Age Adolescents During the COVID-19 Pandemic: An Analytical Study.Cureus · 2024Article
- Screen Time Correlates of Bullying Perpetration and Victimization in Brazilian Adolescents.Journal of child & adolescent trauma · 2023Article
- Establishing the Minimum Media Time Sample Required to Obtain Reliable Estimates of Children's Digital Media Food Marketing Exposures.Current developments in nutrition · 2023Article
- Cross-Sectional Associations of Screen Time Activities With Alcohol and Tobacco Consumption Among Brazilian Adolescents.International journal of public health · 2023Article
- Associations between Sociodemographic, Dietary, and Substance Use Factors with Self-Reported 24-Hour Movement Behaviors in a Sample of Brazilian Adolescents.International journal of environmental research and public health · 2021Article
- Association between Lifestyle Behaviors and Health-Related Quality of Life in a Sample of Brazilian Adolescents.International journal of environmental research and public health · 2020Article
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5 authors.
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Abstract
objectiveTo analyze the content validity and the test-retest reliability of the Questionnaire for Screen Time of Adolescents (QueST).
methodsA study was conducted with high school adolescents from Southern Brazil enrolled in public education (2019). The QueST measures screen time across five constructs: studying, working/internship-related activities, watching videos, playing games, using social media/chat applications. Content validation involved consulting with experts and adolescents to evaluate whether the five constructs were clear and representing screen time behaviors, all ratings were quantified. The experts' evaluation provided Content Validity Indexes (CVI) for clarity and representativeness of the questionnaire. Students answered the QueST twice (1-week apart), and differences between applications were verified. Test-retest reliability was assessed using Intraclass Correlation Coefficients (ICC) and Bland-Altman analyses.
resultsAmong the experts, the CVI indicated 94% and 98% of clarity and representativeness, respectively. All items were highly clear for at least 70% of the students. Test-retest reliability was assessed with 104 students (16.3 ± 1.02 years; 66.3% girls). The ICC ranged from 0.41 (95%CI 0.24-0.56) for videos to 0.76 (95%CI 0.66-0.83) for social media/chat applications on weekdays; and from 0.24 (95%CI 0.04-0.41) for videos to 0.67 (95%CI 0.54-0.77) for social media/chat applications on weekends. The lowest mean difference was -4.6 min for working on weekdays, while the highest was 40.6 min for videos on weekends.
conclusionsThe QueST proved to be fair to excellent for measuring different screen time constructs. However, the item of videos (weekends) showed poor stability. The QueST demonstrates satisfactory content validity attested by the experts and adolescents.
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