Impact of contour on aesthetic judgments and approach-avoidance decisions in architecture
- aDepartment of Psychology, University of Toronto–Scarborough, Toronto, ON, Canada M1C 1A4;
- bDepartment of Psychology, Universidad de La Laguna, La Laguna, 38205 Santa Cruz de Tenerife, Spain;
- cDepartment of Psychology, York University, Toronto, ON, Canada M3J 1P3;
- dDepartment of Neurology, University of Pennsylvania, Philadelphia, PA 19104;
- eDepartment of Architecture, Design, and Media Technology, University of Aalborg, DK - 9000 Aalborg, Denmark;
- fFaculty of Psychology and Cognitive Science Research Platform, University of Vienna, 1010 Vienna, Austria;
- gDepartment of Physiology, Universidad de La Laguna, La Laguna, 38071 Santa Cruz de Tenerife, Spain;
- hThe Royal Danish Academy of Fine Arts, Schools of Architecture, Design, and Conservation, School of Architecture, DK - 1435 Copenhagen, Denmark;
- iDanish Research Centre for Magnetic Resonance, Copenhagen University Hospital Hvidovre, DK-2650 Copenhagen, Denmark; and
- jDecision Neuroscience Research Group, Department of Marketing, Copenhagen Business School, DK-2000 Copenhagen, Denmark
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Edited by John C. Avise, University of California, Irvine, CA, and approved April 23, 2013 (received for review February 13, 2013)

Abstract
On average, we urban dwellers spend about 90% of our time indoors, and share the intuition that the physical features of the places we live and work in influence how we feel and act. However, there is surprisingly little research on how architecture impacts behavior, much less on how it influences brain function. To begin closing this gap, we conducted a functional magnetic resonance imaging study to examine how systematic variation in contour impacts aesthetic judgments and approach-avoidance decisions, outcome measures of interest to both architects and users of spaces alike. As predicted, participants were more likely to judge spaces as beautiful if they were curvilinear than rectilinear. Neuroanatomically, when contemplating beauty, curvilinear contour activated the anterior cingulate cortex exclusively, a region strongly responsive to the reward properties and emotional salience of objects. Complementing this finding, pleasantness—the valence dimension of the affect circumplex—accounted for nearly 60% of the variance in beauty ratings. Furthermore, activation in a distributed brain network known to underlie the aesthetic evaluation of different types of visual stimuli covaried with beauty ratings. In contrast, contour did not affect approach-avoidance decisions, although curvilinear spaces activated the visual cortex. The results suggest that the well-established effect of contour on aesthetic preference can be extended to architecture. Furthermore, the combination of our behavioral and neural evidence underscores the role of emotion in our preference for curvilinear objects in this domain.
Footnotes
- ↵1To whom correspondence should be addressed. E-mail: oshinv1{at}mac.com.
Author contributions: O.V., G.N., A.C., L.B.F., H.L., M.N., N.R., and M.S. designed research; G.N. and C.M. performed research; O.V. and G.N. analyzed data; and O.V. wrote the paper.
The authors declare no conflict of interest.
This paper results from the Arthur M. Sackler Colloquium of the National Academy of Sciences, “In the Light of Evolution VII: The Human Mental Machinery,” held January 10–12, 2013, at the Arnold and Mabel Beckman Center of the National Academies of Sciences and Engineering in Irvine, CA. The complete program and audio files of most presentations are available on the NAS Web site at www.nasonline.org/evolution_vii.
This article is a PNAS Direct Submission.
Data deposition: The MRI and behavioral data have been deposited in http://figshare.com.