Brain response to Information Structure misalignments in linguistic contexts

作者：La Rocca Dania; Masia Viviana; Maiorana Emanuele; Vallauri Edoardo Lombardi; Campisi Patrizio^*

来源：Neurocomputing, 2016, 199: 1-15.

DOI：10.1016/j.neucom.2016.03.001

• Language processing
• EEG
• Misalignment

The paper inquires, through the analysis of electroencephalographic (EEG) recordings, the processing costs associated to misalignments between the information status (Given/New) of discourse contents and their linguistic packaging as Topic or Focus in discourse. The way information is packaged within utterances, that is, their Information Structure, guides language comprehension. Sentences are typically organized into Topic and Focus units, commonly conveying Given (already active in working memory) and New (not active) information, respectively. Nonetheless, for precise purposes, novel information can be presented in Topic, and known information in Focus. The paper accounts for the efficiency of brain processing in response to such "violations" of Information Structure, through both EEG spectral analysis and whole-brain functional connectivity patterns. The main contribution of the present work is the analysis of brain responses in natural contexts, i.e. when processing whole texts of more sentences, instead of isolated (couples of) utterances as is the case of a number of experimental paradigms pursued in the psycholinguistic domain. EEG signals recorded from a population of 54 subjects highlight the presence of rhythmic changes in different frequency bands, depending on aligned and misaligned Information Structures.

• 出版日期2016-7-26