Refinement of the SWN-20 based on the Rasch rating model

Investigating Psychometrics of Career Decision Ambiguity Tolerance Scale

This study aimed to validate career decision ambiguity tolerance scale-Korean form applicable to a Korean sample. In study 1, 17-items from the original 18-item career decision ambiguity tolerance scale were valid based on IRT. In study 2, using the confirmatory factor analysis, we showed that excluding item 4 from the original scale is better than including it in the three factors model. Given the results of study 1 and 2, the constructs in the 17-item career decision ambiguity tolerance scale-Korean form were valid. In study 3, career decision ambiguity tolerance positively predicted career decision-making self-efficacy, career indecision, and career adaptability, respectively, after controlling for calling and career search self-efficacy. Thus, the incremental validity of the career decision ambiguity tolerance scale-Korean form was ensured. In study 4, the reliability of the scale was retained as the test-retest (conducted over a 4-week period) demonstrated adequate results.

The longitudinal trends in the relationship between drug-induced extrapyramidal symptoms and personal and social performance in a population of the patients with schizophrenia: A latent growth model

The aim of this study was to explore the longitudinal trends in the relationship between personal and social functioning and drug-induced extrapyramidal symptoms (DIEPS). The baseline sample included 484 patients with schizophrenia. Participants were assessed at baseline, weeks 4 (time 2), 8 (time 3), and 12 (time 4) regarding social functioning, and DIEPS. In latent growth analysis, the path coefficient between the intercept for the DIEPSS and the intercept for the PSP indicated a significant cross-sectional relationship between these two variables. And the path coefficient between the intercept of the DIEPSS and the slope of the PSP was also significant, indicating that patients who initially had more serious side effects tended to exhibit less improvement in their personal and social functioning over time. Similarly, a significant path coefficient between the slopes of the two variables indicated a dynamic and possibly reciprocal association over time. In addition, K-PSP scale showed good construct validity and reliability. Based on the standardized PSP scale, our results demonstrate DIEPSS induced by antipsychotic treatment dynamically affect personal and social functioning over time, a negative association between psychosocial aspects and the DIEPS.

Longitudinal relationship between Personal and Social Performance (PSP) and anxiety symptoms in schizophrenia

BACKGROUND

We aimed to examine the longitudinal relationship between the personal and social functioning and anxiety symptoms in patients with schizophrenia. For this purpose, we confirmed the validity of the anxiety subscale of the Symptom-Checklist-90-Revised (SCL-90-R) and then applied the latent growth modeling method for longitudinal causal relationships.

METHODS

Five hundred and seventy-eight patients diagnosed with schizophrenia were evaluated and 369 patients were included in the study at baseline. After conducting Rasch model analyses for the validation of the anxiety subscale in the SCL-90-R, we applied latent growth model to determine the causal relationship between the PSP and the anxiety symptoms.

RESULTS

The validity of the anxiety subscale of the SCL-90-R was confirmed based on the Rasch rating model, where the criteria for Infit, Outfit, item difficulty, and point-measure correlations were satisfied. The results from the latent growth model showed that the intercept and slope (rate of change) of the PSP negatively predicted the slope of anxiety symptoms along the longitudinal trajectory. Together with previous studies examining the predictive role of anxiety symptoms on quality of life, our longitudinal findings lend evidence for bidirectional effects between quality of life and anxiety symptoms. The transactional nature of the relationship between anxiety symptoms and quality of life warrant further investigation using a longitudinal cross-lagged design.

CONCLUSION

The anxiety subscale of the SCL-90-R may be utilized by clinicians and researcher to make inferences about quality of life in addition to assessing anxiety symptoms in patients with schizophrenia.