Abstract
The Mindful Attention Awareness Scale is a measure of mindfulness, which is defined as an individual's degree of attention and awareness. In this study, a Japanese version of the scale was developed and validated with 377 Japanese participants ranging in age from 18 to 84 years old. Exploratory factor analysis revealed that the Japanese version had a single-factor structure, and the internal consistency was as high as in the original version of the scale. Similar to the original version, the Japanese version correlated with measures of openness, rumination, action slips, and well-being. Moreover, item response theory analysis revealed that the Japanese version could differentiate between low and very low levels of the latent trait of mindfulness. These results indicate that the Japanese version is an appropriate measure of trait mindfulness among Japanese people. It could be useful for examining the correlation between mindfulness and well-being and the effectiveness of mindfulness-based interventions.