Purchase this article with an account.
or
Journal of Vision. 2009; 9(8):744. https://doi.org/10.1167/9.8.744
Journal of Vision. 2008; 8(6):228. https://doi.org/10.1167/8.6.228
Journal of Vision. 2002; 2(7):424. https://doi.org/10.1167/2.7.424
This PDF is available to Subscribers Only