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SUMMARY:Attention modifies the weights of competing stimulus sources durin
 g integrated visual decision making - Professor Jason Mattingley
DTSTART:20190405T100000Z
DTEND:20190405T120000Z
UID:TALK122374@talks.cam.ac.uk
CONTACT:Tristan Bekinschtein
DESCRIPTION:Virtually every aspect of waking life requires a decision. The
  ability to decide on the basis of multiple goal-relevant signals while ig
 noring distractors is a hallmark of adaptive\, intelligent behaviour. Whil
 e attention and decision-making processes have been well characterised in 
 isolation\, much less is known about how the two interact. Here I will des
 cribe a novel approach for investigating how observers combine task-releva
 nt signals from two or more sources into a single\, integrated decision. I
 n a typical version of the task\, observers are required to reproduce the 
 average motion direction of two consecutively presented target-motion patc
 hes\, while we record brain activity using electroencephalography (EEG). A
 cross a series of experiments we have investigated the influence of salien
 t distractors on such integrated decisions\, and have quantified the effec
 ts of variations in the strength of component motion signals. Using forwar
 d encoding modelling of the EEG data\, we have also determined how neural 
 signatures of the featural information carried by each target stimulus con
 tribute to observers’ final\, integrated decisions.
LOCATION:Ground Floor Lecture Theatre\, Department of Psychology
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