Watkins, P. C., Woodward, K., Stone, T., &Kolts, R. L. (2003). Gratitude and happiness: Development of a measure of gratitude, and relationships with subjective well-being.
The purpose of these studies was to develop a valid measure of trait gratitude, and to evaluate the relationship of gratitude to subjective well-being (SWB). Four studies were conducted evaluating the reliability and validity of the Gratitude Resentment and Appreciation Test (GRAT), a measure of dispositional gratitude. This measure was shown to have good internal consistency and temporal stability. The GRAT was shown to relate ...