Married couples in supportive relationships felt significantly less stressed while watching horror movie clips with their partner than without, as measured by pupil dilation

Image Captions: a: Tonic pupil size as a function of video condition, spouse condition, and relationship quality. Note. Graph shows pupil size in millimeters across all video clips from videos’ onset to videos’ end. The lines depict the average linear change for all participants and for all video clips as reported in Table 4. Circles and triangles represent the raw data in 100ms bins. b: Average tonic pupil change by condition: Three-way interaction. Note. This graph depicts the amount of increa Credit: Graff et al, 2021, PLOS ONE (CC-BY 4.0, https://creativecommons.org/licenses/by/4.0/)