06 févOn letter identities and letter positions06 fév 2012
Presented by Jonathan Grainger: Laboratoire de Psychologie Cognitive, CNRS & Aix-Marseille University
Starting from a model of orthographic processing that distinguishes between retinotopic letter detectors and word-centered sublexical orthographic representations, I will describe recent empirical research that systematically compared encoding of identity and position information for random letter strings (e.g., PGFMR) and sequences of familiar symbols (e.g., £ ? % < &). This research reveals important differences in the way these two types of stimuli are processed in a variety of paradigms designed to investigate different types of perceptual and attentional phenomena: crowding, perceptual matching, change detection, and exogenous cueing. The results provide support for the two distinct mechanisms for coding letter position information that are postulated in our model of orthographic processing.
Lieu : Salle de réunion du LPP, H432, 4ème étage,
Centre Biomédical des Saints Pères
45 rue des Sts Pères, 75006 Paris