Question 17 of 10

Across 11,196 couples, how much did each partner’s personality and traits add to predicting relationship quality?

Nothing detectable.

Joel, Eastwick et al. (2020), PNAS. A person’s own relationship-specific perceptions explained roughly 45% of their satisfaction. Partner judgements and both partners’ traits added nothing on top.

Source: peer-reviewed or nationally representative survey

Nine more questions, every answer from published research. You are scored on how far off you were and in which direction — never on how many you got right.