Key result
The range of frequency of EEG signals during writing at the beta sub band was greater for dyslexic children (22-28 Hz) compared to normal children (14-22 Hz).
Why the study?
Does the frequency range of EEG signals differ between dyslexic and normal children during writing?
Observational
Does the frequency range of EEG signals differ between dyslexic and normal children during writing?
EEG signal analysis during writing shows a higher beta sub-band frequency range in dyslexic children compared to normal children, suggesting a potential method for early detection.
Electroencephalogram (EEG) is one of the methods to detect dyslexia in children. Dyslexia has to be detected at an early stage to help the children to excel in their study and later be successful in life. In this study, the EEG signals generated from dyslexic and normal children during relax and writing words were processed, analysed and compared. Four electrodes; C3, C4, P3 and P4 were used in the recording of the EEG signals. The recorded EEG signals were filtered using a band pass filter with frequency range of 8 – 30 Hz. The signal was then analyzed using Fast Fourier Transform. Analysis of EEG signals showed that the range of frequency of EEG signals during writing for dyslexic was greater than that of normal children for each electrode placement at beta sub band frequency. The range of frequency of EEG signals for dyslexics is 22 – 28 Hz whereas for normal children is 14 – 22 Hz.
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Fadzal et al. (2012) conducted an observational in Dyslexia. Dyslexia vs. Normal children was evaluated on Range of frequency of EEG signals during writing at beta sub band frequency. The range of frequency of EEG signals during writing at the beta sub band was greater for dyslexic children (22-28 Hz) compared to normal children (14-22 Hz).
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