title: A confirmatory factor analysis of the Impact of Event Scale using a sample of World War II and Korean War veterans.
abstract: This study assessed the factor structure of the Impact of Event Scale (IES), a measure of intrusion and avoidance, using a sample of World War II and Korean War veterans who had experienced combat 40-50 years earlier. A series of 3 confirmatory factor analytic models were specified and estimated using LISREL 8.3. Model 1 specified a 1-factor model. Model 2 specified a correlated 2-factor model. Model 3 specified a 2-factor model with additional cross-factor loadings for Items 2 and 12. Model 3 was found to fit the data. In addition, this model was found to be a better explanation of the data than the other models. Also in addition, the correlations between the Intrusion and Avoidance factors and the 4 subscales of the 28-item General Health Questionnaire were examined to determine the distinctiveness of the two IES factors.
authors.affiliation: School of Psychology and Communication, University of Ulster at Magee College, Northern Ireland. n.shevlin@ulst.ac.uk
authors.forename: M
authors.initials: M
authors.lastname: Shevlin
authors.forename: N
authors.initials: N
authors.lastname: Hunt
authors.forename: I
authors.initials: I
authors.lastname: Robbins
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003130:Combat Disorders / Q000175:diagnosis* / Q000523:psychology; D004739:England; D005163:Factor Analysis, Statistical; D006801:Humans; D008297:Male; D008875:Middle Aged; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011594:Psychometrics; D015203:Reproducibility of Results; D014728:Veterans / Q000523:psychology*; D014857:Warfare