Factorial Structure and Preliminary Validation of the Schema Mode Inventory for Eating Disorders (SMI-ED)

Area of Science:

• Psychology
• Clinical Psychology
• Psychometrics

Background:

• Schema Mode Inventory (SMI) is a measure of psychological modes.
• Eating disorders are complex mental health conditions with significant psychopathology.
• A specific measure for schema modes in eating disorders is needed.

Purpose of the Study:

• To examine the psychometric properties and factorial structure of the Schema Mode Inventory for Eating Disorders (SMI-ED).
• To develop and validate a new instrument for measuring schema modes in a disordered eating population.

Main Methods:

• 573 participants with disordered eating completed the adapted 190-item SMI-ED.
• Confirmatory Factor Analysis (CFA) and internal consistency (Cronbach's α) were used for psychometric testing.
• Multivariate Analyses of Covariance (MANCOVA) assessed differences between EDE-Q subscales and SMI-ED modes.

Main Results:

• Factorial analysis confirmed a 16-factor solution for the SMI-ED, indicating adequate internal structure validity.
• Concurrent validity was established through correlations between SMI-ED modes and Eating Disorder Examination Questionnaire (EDE-Q) subscales.
• The study provides preliminary evidence for the SMI-ED as a valid and reliable measure for schema modes in eating disorders.

Conclusions:

• The SMI-ED is a psychometrically sound instrument for measuring schema modes in individuals with eating disorders.
• This research offers valuable insights into schema modes relevant to eating disorder psychopathology.
• The SMI-ED can aid in the measurement and conceptualization of schema modes within this clinical population.