The field-size effect: Short motions look faster than long ones. (May 2018)

• Record Type: Journal Article
• Authors: Anstis, Stuart; Kim, Juno
• Is Part Of: Vision research. Volume 146/147(2018)
• Page Start: 32
• Page End: 40
• Publication Date: 2018-05
• Subjects: Motion perception -- Velocity -- Aperture effect -- Illusion; Vision -- Periodicals; 573.88
• DOI: 10.1016/j.visres.2018.02.003
• Languages: English
• ISSNs: 0042-6989

Abstract

Abstract: Reducing the amount of motion information can surprisingly make motion look faster (e.g., motion behind Venetian blinds). We found that a textured pattern moving to the right at speeds ranging from 0.34 to 5.5°/s appeared to move 50% faster when viewed through a short (0.5°) compared with a long (4.5°) horizontal slot. Perceived speed varied inversely with the log of the slot length. We varied the length of rectangular apertures over a tenfold range and manipulated their size, shape, and orientation. We attribute the field-size effect mostly to landmarks provided by the ends of the slots, but we also examined temporal and spatial frequency and lateral inhibition of motion.