Temporal dynamics and EEG correlates of feature misbinding
Abstract
Misbinding is a perceptual phenomenon where subject perceives the features of different objects correctly but does not bind them correctly into integrated objects: the features of two stimuli are combined in the perceived object. Although a lot of the feature misbinding reseach has studied this phenomenon in space domain only a limited set of studies have investigated feature misbinding in time domain. We conducted three experiments with a simple masking task with stimuli presented in the same location to study temporal dynamics and electrophysiological correlates of misbinding. Comparing the temporal dynamics of misbinding and error trials we found that misbinding is a different phenomenon from simple error trials. However, we also observed asymmetries between misbinding types. Our results suggest that only misbinding where the shape of the first stimulus is bound to orientation of the second stimulus is a real perceptual phenomenon whereas misbinding where shape of the second stimulus is bound to orientation of the first stimulus is indistinguishable from error trials. These results were supported by electrophysiological evidence. Comparing the event-related potentials of misbinding types and errors, we found that misbinding with shape of the first stimulus and orientation of the second stimulus differs from simple errors by having higher P3 amplitude. Our results show that the masking paradigm can be a fruitful experimental setup for studying feature binding and misbinding.
Description
Ligipääs piiratud kuni 24.05.2014