Can Self-Disorders Be Self-Rated? Theoretical and Empirical Validity of the Inventory of Psychotic-Like Anomalous Self-Experiences.
Psychopathology April 27, 2026 Mads Gram Henriksen, Håvard Hovstad, Helena Cobanovic et al.
The Inventory of Psychotic-Like Anomalous Self-Experiences (IPASE), a self-report questionnaire, was compared with the semi-structured clinical interview Examination of Anomalous Self-Experience (EASE) in 41 participants (including patients with psychosis or schizotypal disorder, other mental disorders, and healthy controls). IPASE and EASE total scores were moderately correlated (Spearman's ρ = 0.54), sharing about 29% variance. Qualitative analysis revealed that IPASE item endorsements often reflected ordinary experiences, medication effects, or psychotic symptoms rather than the subtle self-disorders captured by the EASE. The results indicate that IPASE and EASE do not measure the same construct, raising serious doubts about IPASE's validity for assessing self-disorders and emphasizing the need for phenomenological interviewing.