Measurement Invariance of Psychotic-Like Symptoms as Measured With the Prodromal Questionnaire, Brief Version (PQ-B) in Adolescent and Adult Population Samples

Datos Bibliográficos

ID15524322
AutoresUlla Lång (0000-0002-1399-0635, Finnish Institute for Health and Welfare), Vijay A Mittal (0000-0001-9017-5119, Northwestern University), Jason Schiffman (0000-0002-1363-4497, University of California, Irvine), Sebastian Therman (0000-0001-9407-4905, Finnish Institute for Health and Welfare, autor de correspondencia)
Año2021
Volumen11
Páginas593355-593355
Fecha de publicación2021-01-21
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaFrontiers in Psychiatry (JOURNAL)
Identificadores de la revistaISSN: 1664-0640 • E-ISSN: 1664-0640
EditorialFrontiers Media (PUBLISHER • CH)
DOI10.3389/fpsyt.2020.593355
PMID33584365
OpenAlexW3121324032
IdiomaEN
Citas recibidas1
Referencias citadas50

Valid measurement of group differences in self-reported psychotic-like experiences (PLEs) requires knowing any group-specific measurement properties of the instruments. We investigated the measurement invariance of the 21-item Prodromal Questionnaire-Brief (PQ-B) questionnaire across gender, ethnic minority/majority status, and presence of depressive symptoms in two different US non-clinical undergraduate samples ( N = 1,099). For each item, endorsement of the experience and the associated distress were combined for analysis. A unidimensional model of the PQ-B fit the data well. Across genders, the PQ-B showed configural and metric, but not full scalar invariance; there were statistically significant differences in eight thresholds of six items, most being higher endorsement thresholds for self-identified females. Partial scalar invariance was also found for ethnic status, with five thresholds of three items being higher for the minority participants. For depressive symptomatology, defined as the top quintile by the Beck Depression Inventory-II, partial scalar invariance required dropping one item, after which there were statistically significant differences only in two response thresholds. Overall, a wide range of PLE questionnaire items were found to be robust to gender and ethnicity effects, strengthening confidence in found group differences in PLEs. Although full scalar invariance could not be ascertained for any of the group comparisons, the few found scalar differences across groups were small, with minimal impact on group PLE estimates. However, since PLEs are easily conceptually entangled with depression symptoms, similar items should be considered for exclusion if separable constructs are the target of investigation

Confirmatory factor analysis · Distress · Ethnic group · Measurement invariance · Population · Statistics · Structural equation modeling · Bipolar Disorder and Treatment · Clinical Psychology · Mathematics · Medicine · Mental Health Research Topics · Psychology · Schizophrenia research and treatment