What crowds in crowding?

Herzog MH Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerlandmichael.herzog@epfl.chhttp://lpsy.epfl.ch/people/herzog/
Sayim B Department of Psychology, University of Bern, Bern, Switzerlandbilge.sayim@psy.unibe.chhttp://www.unibe.ch/
Manassi M Department of Psychology, University of California Berkeley, CA USAmauro.manassi@berkeley.eduhttp://whitneylab.berkeley.edu/mauro_manassi.html.
Chicherov V Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerlandvachicherov@gmail.comhttps://www.linkedin.com/in/vitaly-chicherov-b7052a31.