Direct behavioural evidence of the effect of internal noise on the time course of perceptual decisions

By Nicola Megna and Stefano Baldassi

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Nicola Megna

Nicola Megna graduated with honours from the University of Florence in 2005 and his degree thesis “High-confident decisions in visual clutter: psychophysical studies and SDT models” was published as an article in PLoS Biology (Baldassi, Megna, Burr 2006). He then went on to work with an Italian clinical foundation studying visual search in subjects with autism. He is now a PhD student at the University of Florence under the supervision of Stefano Baldassi. Here he has translated a book by Jeremy Wolfe, Dennis Levi et al. ("Sensation and Perception", Sinauer 2005) for Italian students ("Sensazione e Percezione", Zanichelli 2007), along with helping undergraduates with their thesis and taking tutorials.

His poster also won the “premio Purghé” prize for the best psychophysical work at the AIP conference (Italian Psychologists Association) on the 18th September in Como.

Research Interests:

Nicola’s main focus is on the comprehension of the errors occurred in driving and therefore crash prevention.

Visual perception, attention and perceptual decisions using behavioural and electrophysiological techniques on normal and pathological subjects.  In particular, he concentrates on the temporal characteristics of perceptual decisions modulated by attention referring to sequential sampling models, using accuracy and reaction times as measures, as well as image classification, evoked potentials and mathematical modeling.

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