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Frequency-response-based Wavelet
Decomposition for Extracting
Children’s Mismatch Negativity
Elicited by Uninterrupted Sound
Department of Mathematical Information Technology ,University of Jyväskylä,Jyväskylä 40014,Finland
Center for Intelligent Maintenance Systems,University of Cincinnati,OH 45221,USA
School of Psychology, Beijing Normal University,Beijing 100875,China
Department of Psychology,University of Jyväskylä, Jyväskylä 40014,Finland
Received 6 Apr 2011; Accepted 14 Sep 2011; doi: 10.5405/jmbe.908
Chairman:Hung-Chi Yang
Presenter: Yu-Kai Wang
Advisor: Dr. Yeou-Jiunn Chen
Date: 2013.3.6
Outline
Introduction
Purposes
Materials and Methods
Results
Conclusions
Material and Methods
 2.1 Experimental design and procedure
 Experimental design
 The data were collected at the Department of Psychology at
the University of Jyväskylä, Finland
 MMN responses of 114 children without hearing defects were
recorded
 The mean age of the children was 11 years 8 months
Material and Methods
 Procedure
 Step 1. The children listened to an uninterrupted sound
 Alternated between 100-ms sine tones of 600 Hz and 800 Hz
 There was no pause between the alternating tones and their
amplitudes were equal
 Step 2. 15% of the 600-Hz tones were randomly replaced by
shorter ones of 50-ms or 30-ms duration
 The number of dev50ms was equal to that of dev30ms
Material and Methods
 Step 3. There were at least six repetitions of alternating 100ms tones between two deviants.
 The stimuli were presented binaurally through headphones at
65 dB
 Step 4. The children were instructed to not pay attention to
the sounds
 While sitting quietly and still watching a silent movie for 15
minutes