[1] Univ Calif Berkeley, Dept Psychol, Vis Sci Program, 3210 Tolman Hall, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Helen Wills Neurosci Inst, Berkeley, CA 94720 USA
[3] Univ London, Ctr Appl Vis Res, London, England
[4] Hebrew Univ Jerusalem, Edmond & Lily Safra Ctr Brain Sci, Jerusalem, Israel
[5] Hebrew Univ Jerusalem, Silberman Life Sci Inst, Jerusalem, Israel