Continuum and linearity hypotheses on the relationship between psychopathology and eating disorder symptomatology

This article discusses various notions of continuity and discontinuity relating to eating disorders, and suggests that current research on the subject is implicitly based on hypotheses on linearity. In this study, we tested these hypotheses by asking 265 female participants to complete the Eating Attitude Test (EAT) and Eating Disorder Inventory (EDI). We found a linear increase in psychological disturbances from normalcy to the milder forms of disordered eating, but a sharp and non-linear increase among the women with more severe signs of eating disorders. The results indicate that neither linearity nor non-linearity alone sufficiently describes the relationship between predisposing factors and eating disorder symptomatology.