Why do curved rooms feel more beautiful?

What happens in the brain when we look at round and angular spaces.

Architects choose every day between straight lines and curves. Is that only a matter of style, or does the shape of a room speak to something deeper in us?

The study

18 participants looked at 200 photographs of interiors while lying in an fMRI scanner. Half of the rooms had curved contours, half had straight lines and sharp angles. Participants decided whether each room was beautiful or not, and whether they would rather enter it or leave it.

The findings

Curved rooms were judged beautiful more often than angular ones. When people judged the beauty of curved rooms, the anterior cingulate cortex was more active, a region linked to reward and emotional significance. The shape of the room did not change whether people wanted to enter or leave it.

What this means for architecture

Contour is not neutral. The study suggests that curved lines can shape how beautiful and how pleasant a space feels, a quality design can use together with light, material and proportion.

Conclusion

The line we draw on paper becomes the line people feel in space.