Methods, devices, and systems provide for capturing and sharing emotion data to determine the emotional compatibility of couples for online dating or longer-term relationships. An emotion monitoring device (EMD) measures physiological signals obtained from biosensors and computes an emotion profile in response to standardized stimuli displayed to the user. The emotion profile for each user is transmitted to an internet server. The emotion profiles are correlated with other variables measuring successful dating or marital relationships to enhance the selection of suitable partners from the pool of users. In an alternative embodiment, emotion data are captured from a couple during a face-to-face or online dating interaction. Each person shares their emotion data with the other during the interaction. In an embodiment for face-to-face or virtual dating games the emotion data of a group of users, each equipped with an EMD, are captured, displayed, and shared.
