The authors would like to express their appreciation to Dr. Virginie Attina (INSERM) for her support during data collection. Also, we thank Prof. Dr. Jürgen Hellbrück (KU Eichstätt-Ingolstadt) for granting the research stay of the first author at the INSERM. The study was also supported by a grant of the Deutsche Forschungsgemeinschaft (We 4156/2-1).
What characterizes changing-state speech in affecting short-term memory? An EEG study on the irrelevant sound effect
Article first published online: 1 AUG 2011
Copyright © 2011 Society for Psychophysiological Research
Volume 48, Issue 12, pages 1669–1680, December 2011
How to Cite
Schlittmeier, S. J., Weisz, N. and Bertrand, O. (2011), What characterizes changing-state speech in affecting short-term memory? An EEG study on the irrelevant sound effect. Psychophysiology, 48: 1669–1680. doi: 10.1111/j.1469-8986.2011.01263.x
- Issue published online: 1 AUG 2011
- Article first published online: 1 AUG 2011
- (Received April 7, 2011; Accepted June 1, 2011)
- Normal Volunteers;
The irrelevant sound effect (ISE) describes reduced verbal short-term memory during irrelevant changing-state sounds which consist of different and distinct auditory tokens. Steady-state sounds lack such changing-state features and do not impair performance. An EEG experiment (N=16) explored the distinguishing neurophysiological aspects of detrimental changing-state speech (3-token sequence) compared to ineffective steady-state speech (1-token sequence) on serial recall performance. We analyzed evoked and induced activity related to the memory items as well as spectral activity during the retention phase. The main finding is that the behavioral sound effect was exclusively reflected by attenuated token-induced gamma activation most pronounced between 50–60 Hz and 50–100 ms post-stimulus onset. Changing-state speech seems to disrupt a behaviorally relevant ongoing process during target presentation (e.g., the serial binding of the items).