Purchase this article with an account.
or
Journal of Vision. 2009; 9(8):158. https://doi.org/10.1167/9.8.158
Journal of Vision. 2008; 8(6):12. https://doi.org/10.1167/8.6.12
Journal of Vision. 2003; 3(9):288. https://doi.org/10.1167/3.9.288
This PDF is available to Subscribers Only