How can you tell if two people are in love?
More eye contact:
This study reports the initial results of an attempt to introduce and validate a social-psychological construct of romantic love. Starting with the assumption that love is an interpersonal attitude, an internally consistent paper-and-pencil love scale was developed. The conception of romantic love included three components, affiliative and dependent need, a predisposition to help, and an orientation of exclusiveness and absorption. Love-scale scores were only moderately correlated with scores on a parallel scale of “liking,” which reflected a more traditional conception of interpersonal attraction. The validity of the love scale was assessed in a questionnaire study and a laboratory experiment. On the basis of the emerging conception of love, it was predicted that college dating couples who love each other a great deal (as categorized by their love-scale scores) would spend more time gazing into one another’s eyes than would couples who loved each other to a lesser degree. The prediction was confirmed.
Source: “Measurement of Romantic Love,” Journal of Personality and Social Psychology, 1970, Vol 16, No 2, pp. 265-273.
Cheryl Murphy offers details in Scientific American:
According to Rubin, normally two people in conversation give each other eye contact anywhere from 30-60% of the time but couples who are in love look at each other 75% of the time during conversation and are slower to break their look away from each other when interrupted.
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