Passionate Love Scale.
The passionate love scale questionnaire is a 14 item questionnaire.
Items are scored on a 1-9 scale, with the total scale score calculated as a sum of the items.
Extremely passionate = 106-135 points
Extremely cool = 15-44 points
Hatfield, E. & Sprecher, S. (l986). Measuring passionate love in intimate relations. Journal of Adolescence, 9, 383-4l0.
Hendrick, C., & Hendrick, S. S. (1989). Research on love: Does it measure up? Journal of Personality and Social Psychology, 56, 784-794.
Fehr, B. (1988). Prototype analysis of the concepts of love and commitment. Journal of Personality and Social Psychology, 55, 557-579.
Fehr, B., & Russell, J. A. (1991). Concept of love viewed from a prototype perspective. Journal of Personality and Social Psychology, 60, 425-438.