title: The Development of the General Factor of Psychopathology 'p Factor' Through Childhood and Adolescence.
abstract: Recent studies have suggested that the structure of psychopathology may be usefully represented in terms of a general factor of psychopathology (p-factor) capturing variance common to a broad range of symptoms transcending diagnostic domains in addition to specific factors capturing variance common to smaller subsets of more closely related symptoms. Little is known about how the general co-morbidity captured by this p-factor develops and whether general co-morbidity increases or decreases over childhood and adolescence. We evaluated two competing hypotheses: 1) dynamic mutualism which predicts growth in general co-morbidity and associated p-factor strength over time and 2) p-differentiation which predicts that manifestations of liabilities towards psychopathology become increasingly specific over time. Data came from the Zurich Project on the Social Development of Children and Youths (z-proso), a longitudinal study of a normative sample (approx. 50 % male) measured at 8 time points from ages 7 to 15. We operationalised general co-morbidity as p-factor strength in a bi-factor model and used omega hierarchical to track how this changed over development. In contrast to the predictions of both dynamic mutualism and p-differentiation, p-factor strength remained relatively constant over the studied period suggesting that such processes do not govern the interplay between psychopathological symptoms during this phase of development. Future research should focus on earlier phases of development and on factors that maintain the consistency of symptom-general covariation across this period.
authors: Violence Research Centre, Institute of Criminology, University of Cambridge, Cambridge, CB3 9DA, UK. am2367@cam.ac.uk.
authors: Aja Louise
authors: AL
authors: Murray
authors: Violence Research Centre, Institute of Criminology, University of Cambridge, Cambridge, CB3 9DA, UK.
authors: Manuel
authors: M
authors: Eisner
authors: Criminological Research Unit, Chair of Sociology, Swiss Federal Institute of Technology Zurich (ETH), Zurich, Switzerland.
authors: Denis
authors: D
authors: Ribeaud
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002657:Child Development; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis / Q000209:etiology / Q000523:psychology*; D008960:Models, Psychological; D011599:Psychopathology; D012307:Risk Factors
keywords: Co-morbidity; Development; Dynamic mutualism; General factor of psychopathology; p-factor