Application of the Chinese version of the 11-item circadian-type inventory (CTI-11) in a working sample
Wang D., Chen H., Chen D., Zhu Z., Zhou X., Meng D., Fan F., Liu X.
This study revised the Chinese version of 11-item circadian-type inventory (CTI-11) and examined its validity and reliability in textile workers. 3833 workers were recruited to complete the Chinese version of CTI-11. The Composite Scale of Morningness (CSM) was used as the concurrent validity instrument. The exploratory factor analysis revealed that the Chinese version of CTI-11 consists of two factors: flexibility/rigidity (FR) and languid/vigorous (LV). The results of confirmatory factor analysis showed that CTI-11 has a good construct validity. Measurement invariance test indicated that the factor structure of CTI-11 is quite stable across gender and work shifts. FR and LV are significantly correlated with CSM, and LV can significantly predict insomnia. The Cronbach’s alpha coefficient of the two subscales were satisfactory. These findings indicated satisfactory psychometric properties of the Chinese version of CTI-11 in a working sample, with the implication that this scale is potentially a reliable assessment tool on individuals’ adaptability to shift work.