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SUMMARY:"Visual crowding: Basic mechanisms and abnormalities associated wi
 th schizophrenia " - Professor Steven Dakin\, Institute of Ophthalmology\,
  London
DTSTART:20120430T120000Z
DTEND:20120430T130000Z
UID:TALK36969@talks.cam.ac.uk
CONTACT:John Mollon
DESCRIPTION:Objects presented in the peripheral field are hard to recognis
 e when they are surrounded by visual clutter\, a phenomenon known as _crow
 ding_. I will first describe work suggesting that this process can be unde
 rstood in terms of _averaging_ of visual features (such as orientation and
  position)  across space\, a process that serves to regularise the appeara
 nce of the periphery. Visual problems in schizophrenia have been linked to
  abnormal processing of visual context and I will report experiments that 
 are consistent with this leading to both poor sensitivity to elongated con
 tours but also to a _reduction_ in crowding.
LOCATION:Kenneth Craik Room\, Craik-Marshall Building\, Downing Site
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