Purchase this article with an account.
or
Journal of Vision. 2009; 9(8):99. https://doi.org/10.1167/9.8.99
Journal of Vision. 2008; 8(6):995. https://doi.org/10.1167/8.6.995
Journal of Vision. 2007; 7(14):18. https://doi.org/10.1167/7.14.18
This PDF is available to Subscribers Only