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Journal of Vision. 2006; 6(6):656. https://doi.org/10.1167/6.6.656

Journal of Vision. 2004; 4(8):364. https://doi.org/10.1167/4.8.364

Journal of Vision. 2003; 3(9):323. https://doi.org/10.1167/3.9.323

Journal of Vision. 2003; 3(5):1. https://doi.org/10.1167/3.5.1