Abstract:
:Attention-Deficit/Hyperactivity Disorder (AD/HD) is the most common psychiatric disorder of childhood and has been extensively researched using EEG technology. Within this literature, one of the most widely examined measures has been the theta/beta ratio. The theta/beta ratio was initially hypothesised to represent the arousal mechanism. However, subsequent research has shown this to be inaccurate and it was hypothesised that the ratio represents cognitive processing capacity. To examine that hypothesis, this study aimed to test the relationship between the P300 and the theta/beta ratio. The P300, absolute alpha and the theta/beta ratio were measured at Fz, Cz and Pz, and correlated in a group of 47 normal adults. A significant positive correlation was found between P300 latency and the theta/beta ratio. No relationship was found between P300 amplitude and the theta/beta ratio. P300 amplitude, but not latency, significantly correlated with alpha power. These results support the hypothesis that the theta/beta ratio is a marker of cognitive processing capacity.
journal_name
Appl Psychophysiol Biofeedbackjournal_title
Applied psychophysiology and biofeedbackauthors
Clarke AR,Barry RJ,Karamacoska D,Johnstone SJdoi
10.1007/s10484-018-09428-6subject
Has Abstractpub_date
2019-06-01 00:00:00pages
123-129issue
2eissn
1090-0586issn
1573-3270pii
10.1007/s10484-018-09428-6journal_volume
44pub_type
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