Publications by authors named "Pamela Bäß"

3 Publications

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Word class and word frequency in the MMN looking glass.

Brain Lang 2021 Jul 5;218:104964. Epub 2021 May 5.

Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Budapest, Hungary; Institute of Psychology, Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary.

The effects of lexical meaning and lexical familiarity on auditory deviance detection were investigated by presenting oddball sequences of words, while participants ignored the stimuli. Stimulus sequences were composed of words that were varied in word class (nouns vs. functions words) and frequency of language use (high vs. low frequency) in a factorial design with the roles of frequently presented stimuli (Standards) and infrequently presented ones (Deviants) were fully crossed. Deviants elicited the Mismatch Negativity component of the event-related brain potential. Modulating effects of lexical meaning were obtained, revealing processing advantages for denotationally meaningful items. However, no effect of word frequency was observed. These results demonstrate that an apparently low-level function, such as auditory deviance detection utilizes information from the mental lexicon even for task-irrelevant stimuli.
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July 2021

Suppression of the auditory N1 event-related potential component with unpredictable self-initiated tones: evidence for internal forward models with dynamic stimulation.

Int J Psychophysiol 2008 Nov 25;70(2):137-43. Epub 2008 Jun 25.

University of Leipzig, Institute of Psychology I, Biological including Cognitive Psychology, Germany.

Internally operating forward model mechanisms enable the organism to discriminate the sensory consequences of one's own actions from other sensory events. The present event-related potential (ERP) study compared the processing of self-initiated tones with the processing of externally-initiated but otherwise identical tones. In different conditions, frequency and onset of the sound were either predictable or unpredictable. The amplitudes of the N1 component of the ERP for the self-initiated relative to the ones for externally-initiated sounds were significantly attenuated even when the particular frequency or sound onset could not be predicted by the subject. These results support internal forward model mechanisms which dynamically predict the sensorial consequences of ones own motor acts even in face of uncertainties with respect to the frequency of the sound and its onset. Moreover, the attenuation effect was reduced when the frequency was unpredictable suggesting that it is easier to discriminate a self-initiated sound with exact foreknowledge.
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November 2008

Optimizing the auditory distraction paradigm: behavioral and event-related potential effects in a lateralized multi-deviant approach.

Clin Neurophysiol 2008 Apr 4;119(4):934-47. Epub 2008 Mar 4.

Institute of Psychology I, University of Leipzig, Seeburgstr. 14-20, 04103 Leipzig, Germany.

Objective: The present study aimed at adapting a multi-deviant auditory distraction paradigm for a comprehensive screening of functions of voluntary and involuntary auditory attention.

Methods: Subjects performed phonetic discrimination on lateralized consonant-vowel syllables in a distraction paradigm in which task-irrelevant deviances occurred on different syllable features. Behavioral performance and event-related potentials (ERPs) were measured within a multi-deviant (frequency, location, and duration deviants, p=0.11 each) and a classic single-deviant design (frequency deviants only, p=0.11). Additionally, ERP effects obtained in an active and a passive multi-deviant condition were compared.

Results: Behavioral and electrophysiological deviance-related effects were rather similar in the multi-deviant and the single-deviant paradigm. Furthermore, the comparison to the passive listening condition revealed a marked effect of voluntary attention on sensory processing of the syllables.

Conclusions: The multi-deviant distraction paradigm provides a gain in time compared to the classic single-deviant distraction paradigm which is not accompanied by a loss in the strength of the effects. Inclusion of a passive listening condition enables the additional evaluation of effects of voluntary attention.

Significance: The present multi-deviant distraction paradigm creates an important step towards a tool suited to investigate involuntary and voluntary attention in selected groups of patients during the processing of task-relevant and task-irrelevant auditory information across different acoustic dimensions.
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April 2008