Psychometric Validation of the Compassion Scale in Japan (CS-J)

Objectives

The Compassion Scale (CS) is a model-based scale to measure compassion for others, comprising four subcomponents: kindness, common humanity, mindfulness, and sensitivity to the suffering of others. This research examined the psychometric properties of the Compassion Scale in Japan (CS-J).

Method

This research (n = 1742) examined the factor structure of the CS-J, the relations of the CS-J to compassion-related constructs (Study 1), intra- and interpersonal well-being (Study 2), and dispositions primarily concerned with the welfare of others (Study 3), and the test-retest reliability over a month (Study 4).

Results

Exploratory structural equation modeling identified that a bifactor structure best represented the CS-J. Internal reliability indicators warranted the use of total scores (internal consistency, ω = 0.94) and subscales (ω = 0.82 to 0.92). The test-retest reliability was adequate for the total scores (r = 0.73) and acceptable for the subscales (r = 0.45 to 0.68). The CS-J showed positive correlations with self-compassion, compassionate engagement and action, mindfulness, empathetic concerns, perspective-taking, altruism, compassionate goals, self-image goals, interdependent happiness, positive affect, life satisfaction, psychological well-being, and social desirability with small to large effect sizes. The CS-J was negatively associated with negative affect and psychological stress responses with small effect sizes.

Conclusions

These results provided evidence for the validity of the CS-J. Our results in Japan indicated that compassion for others represents a balanced system of increased compassionate responding and decreased uncompassionate responding toward others’ suffering.

Preregistration

Our studies were preregistered at the Open Science Framework (https://osf.io/jha6q and https://osf.io/b8f5v).