Generalized graded unfolding model with structural equation for subject parameters

The generalized graded unfolding model (GGUM) is capable of analyzing polytomous scored, unfolding data such as agree‐disagree responses to attitude statements. In the present study, we proposed a GGUM with structural equation for subject parameters, which enabled us to evaluate the relation between subject parameters and covariates and/or latent variables simultaneously, in order to avoid the influence of attenuation. Additionally, an algorithm for parameter estimation is newly implemented via the Markov Chain Monte Carlo (MCMC) method, based on Bayesian statistics. In the simulation, we compared the accuracy of estimates of regression coefficients between the proposed model and a conventional method using a GGUM (where regression coefficients are estimated using estimates of θ). As a result, the proposed model performed much better than the conventional method in terms of bias and root mean squared errors of estimates of regression coefficients. The study concluded by verifying the efficacy of the proposed model, using an actual data example of attitude measurement.     

Reliability and validity of the Japanese language version of Pro‐Change's decisional balance measure for effective stress management1

This study aimed to develop the Japanese language version of Pro‐Change's decisional balance measure for effective stress management (PDSM). Effective stress management refers to activities that are practiced, for at least 20 min per day, to reduce a person's perceived stress. Six hundred and sixty‐five female and 456 male Japanese university and college students participated in this study, which consists of two surveys. Through exploratory and confirmatory factor analyses, the Japanese language version of the PDSM was developed, which contains 12 items and consists of two factors, the Pros and the Cons. The levels of internal consistency are acceptable (Pros = 0.78 and Cons = 0.64). The scores for the Pros and the Cons subscores were not affected by social desirability (Pros = ?0.04 and Cons = ?0.12). We confirmed the construct validity of the Japanese language version of PDSM with theoretically predicted relationships between the decisional balance and the stage of change for effective stress management. The Japanese language version of the PDSM with construct validity and reliability was developed.     

Relationships between stage of change for stress management behavior and perceived stress and coping

The main aim of this study was to examine the relationships between stage of change, which was guided by the transtheoretical model, for stress management behavior and perceived stress and coping. First, we developed the Korean version of the Rhode Island Stress and Coping Inventory (RISCI). Second, we related stage of change for stress management behavior to perceived stress and coping. Based on two surveys that we conducted (n = 530 for survey 1 and n = 299 for survey 2), we developed the Korean version of the RISCI with acceptable internal consistency and criterion‐related validity against the depressive level measured using the Korean Beck Depression Inventory II. The stress score of the Korean version of the RISCI was significantly lower in maintenance than in the other stages, while the coping score was significantly higher in action and maintenance than in the first three stages (n = 804), irrespective of sex. These results provided further empirical evidence to validate stage classification in the field of stress management behavior.