title: A short version of the Self Description Questionnaire II: operationalizing criteria for short-form evaluation with new applications of confirmatory factor analyses.
abstract: Four studies evaluate the new Self Description Questionnaire II short-form (SDQII-S) that measures 11 dimensions of adolescent self-concept based on responses to 51 of the original 102 SDQII items and demonstrate new statistical strategies to operationalize guidelines for short-form evaluation proposed by G. T. Smith, D. M. McCarthy, and K. G. Anderson (2000). Multiple-group confirmatory factor analyses revealed that the factor structure based on responses to 51 items by a new cross-validation group (n=9,134) was invariant with the factor structures based on responses to the same 51 items and to all 102 items by the original normative archive group (n = 9,187). Reliabilities for the 11 SDQII-S factors were nearly the same and consistently high (.80 to .89) for both groups. Multitrait-multimethod analyses support the internal validity of responses over time. Gender and age effects on the 11 SDQII-S factors were invariant across the archive and cross-validation groups.
authors.affiliation: SELF Research Centre, University of Western Sydney, Penrith, NSW, Australia. h.marsh@uws.edu.au
authors.forename: Herbert W
authors.initials: HW
authors.lastname: Marsh
authors.forename: Louise A
authors.initials: LA
authors.lastname: Ellis
authors.forename: Roberto H
authors.initials: RH
authors.lastname: Parada
authors.forename: Garry
authors.initials: G
authors.lastname: Richards
authors.forename: Bernd G
authors.initials: BG
authors.lastname: Heubeck
mesh_terms: D000293:Adolescent; D002648:Child; D005163:Factor Analysis, Statistical; D006801:Humans; D015203:Reproducibility of Results; D012649:Self Concept; D011795:Surveys and Questionnaires; D013997:Time Factors