Longitudinal Factor Analysis and Measurement Invariance of Sense of Coherence and General Self-Efficacy in Adolescence

Sense of coherence (SOC) and General Self-efficacy (GSE) are trait-like self-regulatory attributes, supposedly benefitting health. Previous data on their factorial validity and longitudinal stability in adolescent samples have been inconclusive. The present study examined the factor structure, measurement invariance (MI), and stability coefficients of SOC and GSE among German adolescents in a longitudinal design over the course of nine years from age 15 to age 24. Results supported the factorial validity of both scales. GSE parameters were invariant up to the level of strict invariance, whereas for SOC partial scalar and strict invariance were attainable after modifications. Here we document reliability, validity, and factor mean changes of the SOC and GSE scales from adolescence to young adulthood. Interindividual differences in SOC were moderately stable. Though this implies limited sensitivity to intraindividual developmental changes, it qualifies SOC for long-term predictions. GSE was conspicuously less stable, raising questions about its long-term criterion validity.

Long-Term Stability of Diagnosis and Symptom Dimensions in a Systematic Sample of Patients with Onset of Schizophrenia in Childhood and Early Adolescence. II: Positive/Negative Distinction and Childhood Predictors of Adult Outcome

BackgroundThe aim of this study was to verify the presence and stability across life of the positive/negative distinction in early-onset schizophrenia (EO-SZ) through a longitudinal factor analysis of the schizophrenic dimensions, and to identify the factors predicting several indices of long-term outcome for EO-SZ.MethodForty children consecutively referred for DSM–III–R schizophrenia (SZ) in a specific catchment area comprised the sample.ResultsAcross a 14.8-year follow-up, longitudinal factor analysis identified two separate factors corresponding to the positive and negative symptom dimensions. We also observed that: the GAS rated over the last three years of adult illness and the severity of negative symptoms during the stabilised interepisode intervals in adulthood were the indices of adult outcome that were most easily predicted; and the best childhood predictors of adult outcome were premorbid functioning and severity of positive and negative symptoms during acute episodes.ConclusionsThe presence of premorbid non-psychotic behaviour disturbances (NPBD) and premorbid developmental problems was not related to severity of outcome, in contrast to the former variables.