PMID: 9419387Feb 21, 1998Paper

Letter recognition reveals pathways of second-order and third-order motion

Proceedings of the National Academy of Sciences of the United States of America
C E Ho

Abstract

How are second-order (texture-defined) and third-order (pattern-tracking) motions processed in our brains? As shown here in the context of an ambiguous motion task involving a nominal second-order stimuli first devised by Werkhoven et al., [Werkhoven, P., Sperling, G. & Chubb, C. (1993) Vision Res. 33, 463-485.], the observers fell into two distinct groups based on the direction of perceived motion. The differences were interpreted in terms of the algorithms used to extract motion: one group by using a second-order motion process and the other by using a third-order motion process. This was investigated further using a dual-task paradigm in which the interference between two tasks indicated the nature of processing involved. Observers who used third-order motion processing experienced interference with letter recognition and a more severe interference in dual third-order motion tasks. Observers who used second-order motion processing experienced interference with another second-order motion detection but not with letter recognition. Insofar as task interference implies the need for attention, the complex interference effects and the apparently paradoxical interference effects of second-order motion perception imply that there a...Continue Reading

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Citations

Jan 12, 2013·PloS One·Janne F Ettwig, Adelbert W Bronkhorst
Sep 6, 2003·Perception & Psychophysics·Geniva LiuJames T Enns
Sep 25, 1999·Perception & Psychophysics·P J Bex, C L Baker
Apr 15, 2011·Attention, Perception & Psychophysics·Takeharu SenoShoji Sunaga
Feb 17, 1999·Proceedings of the National Academy of Sciences of the United States of America·D C SomersR B Tootell
Jan 20, 2010·Brain Research·Ali EzzatiAbdolhossein Abbassian
May 20, 2004·Vision Research·Harriet A AllenRobert F Hess
May 7, 2008·Vision Research·F FarzinS M Rivera
Mar 3, 2015·PloS One·Janne F Ettwig, Adelbert W Bronkhorst
Jul 12, 2003·Perception·David RosePaul B Hibbard
Sep 12, 2001·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Z L Lu, G Sperling

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