Tid: Onsdag 18 mars 2015, kl. 15:00–17:00
Plats: C397, Södra huset, Frescati

Seminariet är ett halvtidsseminarium baserat på Hatice Zoras avhandlingsarbete.
Postseminarium följer direkt efter seminariet i institutionens pentry.

Abstract

The effects of prosodic cues on stress perception and lexical access in the brain were investigated using the mismatch negativity (MMN) component of Event-Related Potentials (ERPs). In a passive oddball paradigm, neural responses to changes either in fundamental frequency, spectral emphasis, and duration alone, or in all features were recorded in words and pseudo-words. It was hypothesized that the most salient prosodic cue to stress information and lexical processing would evoke larger MMN, reflecting the perceptual discriminability of acoustic features and the presence of memory traces for stress information in the brain. The preliminary ERP data indicated that changes elicited MMNs in the frontal and the central region at approximately 200 ms after change onset. Individual prosodic cues and the combination of them contributed differentially to detecting stress and hence, differed in their MMN amplitudes. Combined prosodic cues elicited the largest MMN, followed by fundamental frequency and spectral emphasis. Duration does not seem to play a fundamental role in this process. The preliminary data further indicated that there are topographical differences regarding the distribution of prosodic activation.

Välkomna

Hatice Zora