Eating Disorder‐15: Factor Structure, Psychometric Properties, Validity, and Reliability of the Turkish Version for Clinical and Non-Clinical Samples

Hande ÖNGÜN YILMAZ, Aslıhan POLAT, Gizem KÖSE, Sibel BALCI, Ahmet Murat GÜNAL
2023 34(1): 31-38
DOI: 10.5080/u27103
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Objective: Eating Disorder-15 (ED-15) is a self-report scale
recommended for use to evaluate weekly progress and treatment results
in eating disorders. This research aims to examine the factor structure,
psychometric properties, validity, and reliability of the Turkish version
of ED-15 (ED-15-TR) for clinical and non-clinical samples.
Method: Translation-back translation method was used for language
equivalence of ED-15-TR. The research was conducted with a total
of 1049 volunteers, with two sample groups as non-clinical (n=978)
and clinical (n=71). The participants completed an information form,
ED-15-TR, Eating Disorder Examination Scale (EDE-Q), and Beck
Depression Inventory (BDI). Three hundred fifty-two participants
from the non-clinical group and 18 from the clinical group completed
ED-15-TR again within a week.
Results: Factor analysis confirmed the two-factor structure of ED-15-
TR. Cronbach’s alpha value was 0.911 (0.773, and 0.904 for the two
subscales respectively), the intraclass correlation coefficient for testretest
reliability was 0.943 in the clinical group (0.906, and 0.942 for
the two subscales respectively); 0.777 (0.699, and 0.776 for the two
subscales respectively) in the non-clinical group (for all p<0.001). The
high level of a positive correlation between ED-15-TR and EDE-Q
supported concurrent validity.
Conclusion: This research indicates that ED-15-TR is an acceptable,
valid, and reliable self-report scale for Turkish society.
Keywords: Eating disorders, factor analysis, validity, reliability, scale