title: The Youth Psychopathic Traits Inventory: A Bifactor Model, Dimensionality, and Measurement Invariance.
abstract: The current study examines a bifactor model for the Youth Psychopathic Traits Inventory (YPI) in a Dutch community sample of adolescents ( N = 2,874). The primary goal was to examine the latent structure of the YPI with a bifactor modeling approach. Furthermore, the study examines the dimensionality and measurement invariance of the YPI. Results show that a bifactor model at subscale level fits the YPI best. The general psychopathy factor influences the 10 subscales of the YPI strongly, indicating that the YPI seems to be rather unidimensional than multidimensional. Nevertheless, the dimensions still explain nearly one third of the variance found. Findings imply that the bifactor model of the YPI should be used when examining relations with outcome variables, with a focus on the total score of the YPI, while factor scores should be reported with caution. Furthermore, the bifactor model appears invariant for gender, age, and ethnic background.
authors.affiliation: 1 Leiden University, Leiden, Netherlands.
authors.forename: Wendy
authors.initials: W
authors.lastname: Zwaanswijk
authors.affiliation: 1 Leiden University, Leiden, Netherlands.
authors.forename: Violaine C
authors.initials: VC
authors.lastname: Veen
authors.affiliation: 1 Leiden University, Leiden, Netherlands.
authors.forename: Paul
authors.initials: P
authors.lastname: Vedder
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D000296:Adolescent Psychiatry / Q000295:instrumentation*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D009426:Netherlands; D010554:Personality Disorders / Q000175:diagnosis*; D010555:Personality Inventory / Q000592:standards*; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D011599:Psychopathology / Q000295:instrumentation*; D015203:Reproducibility of Results; D012574:Schools; D017678:Sex Distribution
keywords: Youth Psychopathic Traits Inventory; adolescents; bifactor model; dimensionality; measurement invariance; psychopathic traits