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Meeting Abstract

Oblique- and plaid-masking re-visited

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Wichmann,  FA
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Wiebel, C., & Wichmann, F. (2007). Oblique- and plaid-masking re-visited. In K. Wender (Ed.), 49. Tagung experimentell arbeitender Psychologen (pp. 153). Lengerich, Germany: Pabst.


Cite as: http://hdl.handle.net/21.11116/0000-0004-4B1C-A
Abstract
Almost all current models of early spatial vision assume the existence of independent linear channels tuned to a limited range of spatial frequencies and orientations, i.e. that the early visual system acts akin to a sub-band coder. Some classic studies cast doubt on this notion, however, in particular the results reported by Henning, Hertz \& Broadband (1975) using amplitude-modulated gratings and those of Derrington \& Henning (1989) using 2-D plaid maskers. In our study we explore the unusually strong masking induced by spacetime coincident plaids in more detail: in particular, we determine the masking dependency on stimulus presentation time and contrast asymmetry between the plaid components. Such data will help to constrain non-linear extensions to the current channels model.