This study tests the relational turbulence model by considering how qualities of dating relationships may polarize positive evaluations of partner supportiveness and emotional improvement following an interaction about a stressful experience. Sentiment override, which is the tendency for negative relationship qualities to attenuate positive evaluations of a partner, was evaluated as a competing hypothesis. Using a laboratory‐based observation method, participants completed stressful activities and talked with a dating partner. Results supported the relational turbulence model, such that the positive association between observer ratings of enacted support and emotional improvement increased when turbulence was high. All results for perceived supportiveness were nonsignificant. Relationship satisfaction did not predict either outcome; therefore, the sentiment override hypothesis was not supported.