{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/129645"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/129645","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Same or different? Eating disturbances across demographics and identities in adolescents","abstract":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01","abstract_html":"Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01","abstract_has_math":false,"creators":["Xu, Yang"],"institution":"University of Illinois Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Psychology","degree_department":null,"school":null,"contributors":["Briley, D. A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-05-09","date_published":"2025-05-09","updated_at":"2026-07-22T22:25:05Z","subjects":["Adolescent Eating Disorder","Identities","Differential Item Functioning"],"languages":["en","eng"],"rights":["Copyright 2025 Yang Xu"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/129645","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Briley, D. A."]},{"key":"dc:creator","label":"Author","values":["Xu, Yang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-05-09","2025-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Psychology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Adolescent Eating Disorder","Identities","Differential Item Functioning"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Yang Xu"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/129645"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01","The student, Yang Xu, accepted the attached license on 2025-05-08 at 22:15.","The student, Yang Xu, submitted this Thesis for approval on 2025-05-08 at 22:24.","This Thesis was approved for publication on 2025-05-09 at 11:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22276 on 2025-10-19 at 19:17:16","Disordered eating can emerge for various reasons among adolescents. Clinical evidence has persistently documented differences in adolescent eating disorder across demographics and identities. However, much of this research has overlooked the potential for differential item functioning (DIF), which suggests that eating-related items may not be understood or relevant equally across different identity groups. This measurement issue may lead to biased conclusions about group differences and diagnostic biases at the individual level. I formally tested the measurement properties of eating-related items (worry about weight gain, weight control, self-worth related to weight, and binge eating) using data from the Adolescent Brain Cognitive Development (ABCD) study (N = 9, 914 participants, yielding 33,913 cases across waves and informants, ages 10–14) across identities and demographics (i.e., children’s age, race/ethnicity, gender, sexual orientation, time since baseline, family socioeconomic status, ΔBMIp95, and rater). Using moderated nonlinear factor analysis, I identified sources of differential item functioning and conducted valid group comparisons with bias-corrected scores. Adolescents responded to body image items differently as a function of their identity and demographics leading to DIF. Most group differences (i.e., age, gender, race/ethnicity, sexual orientation) were underestimated due to measurement biases, except for rater differences being exaggerated. Bias-corrected group comparison revealed substantial heterogeneity across identities and demographics, with marginalized individuals reporting higher disordered eating (e.g., girl, transgender and gender nonbinary, nonheterosexuality, or Hispanic youth). Gender nonconforming or Black youth showed lower eating disturbance. Consistent with prior research, older age and ΔBMIp95 (deviation from the 95th percentile BMI for age and sex) were associated with more severe eating disturbances. Our results thus highlight the urgent need for more inclusive and culturally sensitive research approaches."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Same or different? Eating disturbances across demographics and identities in adolescents"]}]}],"canonical_facts":{"dc:contributor":["Briley, D. A."],"dc:creator":["Xu, Yang"],"dc:date":["2025-05-09","2025-05"],"dc:description":["Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01","The student, Yang Xu, accepted the attached license on 2025-05-08 at 22:15.","The student, Yang Xu, submitted this Thesis for approval on 2025-05-08 at 22:24.","This Thesis was approved for publication on 2025-05-09 at 11:33.","DSpace SAF Submission Ingestion Package generated from Vireo submission #22276 on 2025-10-19 at 19:17:16","Disordered eating can emerge for various reasons among adolescents. Clinical evidence has persistently documented differences in adolescent eating disorder across demographics and identities. However, much of this research has overlooked the potential for differential item functioning (DIF), which suggests that eating-related items may not be understood or relevant equally across different identity groups. This measurement issue may lead to biased conclusions about group differences and diagnostic biases at the individual level. I formally tested the measurement properties of eating-related items (worry about weight gain, weight control, self-worth related to weight, and binge eating) using data from the Adolescent Brain Cognitive Development (ABCD) study (N = 9, 914 participants, yielding 33,913 cases across waves and informants, ages 10–14) across identities and demographics (i.e., children’s age, race/ethnicity, gender, sexual orientation, time since baseline, family socioeconomic status, ΔBMIp95, and rater). Using moderated nonlinear factor analysis, I identified sources of differential item functioning and conducted valid group comparisons with bias-corrected scores. Adolescents responded to body image items differently as a function of their identity and demographics leading to DIF. Most group differences (i.e., age, gender, race/ethnicity, sexual orientation) were underestimated due to measurement biases, except for rater differences being exaggerated. Bias-corrected group comparison revealed substantial heterogeneity across identities and demographics, with marginalized individuals reporting higher disordered eating (e.g., girl, transgender and gender nonbinary, nonheterosexuality, or Hispanic youth). Gender nonconforming or Black youth showed lower eating disturbance. Consistent with prior research, older age and ΔBMIp95 (deviation from the 95th percentile BMI for age and sex) were associated with more severe eating disturbances. Our results thus highlight the urgent need for more inclusive and culturally sensitive research approaches."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/129645"],"dc:language":["en","eng"],"dc:rights":["Copyright 2025 Yang Xu"],"dc:subject":["Adolescent Eating Disorder","Identities","Differential Item Functioning"],"dc:title":["Same or different? Eating disturbances across demographics and identities in adolescents"],"dc:type":["text"],"thesis:degree_discipline":["Psychology"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:05Z"}