Date of Award

Fall 2026

Language

English

Embargo Period

10-26-2026

Document Type

Master's Thesis

Degree Name

Master of Arts (MA)

College/School/Department

Department of Psychology

Program

Clinical Psychology

First Advisor

Julia Hormes

Committee Members

Julia Hormes, Drew Anderson

Keywords

intolerance of uncertainty, trait, state, eating disorders, experimental task

Subject Categories

Clinical Psychology

Abstract

Abstract

Objective: Intolerance of uncertainty (IU) is widely conceptualized as a stable and generalized trait, but may manifest differently during situation-specific uncertainty. IU is associated with eating disorders (EDs), yet limited research has explored the interaction between IU and ED symptoms during eating-related uncertainty. The study examined whether the interaction between trait IU and ED symptoms predicted state IU responses to eating-related uncertainty. Method: College students (N = 44) completed measures of trait IU (Intolerance of Uncertainty Scale) and ED symptoms (Eating Disorder Examination-Questionnaire) before engaging in a behavioral paradigm designed to induce eating-related uncertainty. Participants provided ratings of different dimensions of state IU (state uncertainty, distress about uncertainty, and threat appraisal of uncertainty) pre- and post-consumption of a shake of unknown caloric density. Grams of shake consumed were also measured. Results: There was a significant effect of trait IU on all dimensions of state IU pre-paradigm, such that greater trait IU predicted greater state IU (all p < .05). There was a significant trait IU x ED symptom interaction effect on distress about uncertainty post paradigm such that greater trait IU predicted more distress only among individuals with higher ED symptoms (p < .05). Neither trait IU nor ED symptoms independently predicted any post-paradigm outcome variables. Discussion: Results highlight the importance of exploring momentary, state IU multidimensionally and during domain-specific uncertainty in addition to generalized trait IU, along with individual characteristics such as ED symptom severity. Uncertainty prior to the behavioral task evoked a more potent IU response compared to experiencing uncertainty during consumption, raising methodological considerations for future research that experimentally manipulates eating-related uncertainty.

License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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