title: Validation of the Emotiv EPOC(®) EEG gaming system for measuring research quality auditory ERPs.
abstract: Background. Auditory event-related potentials (ERPs) have proved useful in investigating the role of auditory processing in cognitive disorders such as developmental dyslexia, specific language impairment (SLI), attention deficit hyperactivity disorder (ADHD), schizophrenia, and autism. However, laboratory recordings of auditory ERPs can be lengthy, uncomfortable, or threatening for some participants - particularly children. Recently, a commercial gaming electroencephalography (EEG) system has been developed that is portable, inexpensive, and easy to set up. In this study we tested if auditory ERPs measured using a gaming EEG system (Emotiv EPOC(®), www.emotiv.com) were equivalent to those measured by a widely-used, laboratory-based, research EEG system (Neuroscan). Methods. We simultaneously recorded EEGs with the research and gaming EEG systems, whilst presenting 21 adults with 566 standard (1000 Hz) and 100 deviant (1200 Hz) tones under passive (non-attended) and active (attended) conditions. The onset of each tone was marked in the EEGs using a parallel port pulse (Neuroscan) or a stimulus-generated electrical pulse injected into the O1 and O2 channels (Emotiv EPOC(®)). These markers were used to calculate research and gaming EEG system late auditory ERPs (P1, N1, P2, N2, and P3 peaks) and the mismatch negativity (MMN) in active and passive listening conditions for each participant. Results. Analyses were restricted to frontal sites as these are most commonly reported in auditory ERP research. Intra-class correlations (ICCs) indicated that the morphology of the research and gaming EEG system late auditory ERP waveforms were similar across all participants, but that the research and gaming EEG system MMN waveforms were only similar for participants with non-noisy MMN waveforms (N = 11 out of 21). Peak amplitude and latency measures revealed no significant differences between the size or the timing of the auditory P1, N1, P2, N2, P3, and MMN peaks. Conclusions. Our findings suggest that the gaming EEG system may prove a valid alternative to laboratory ERP systems for recording reliable late auditory ERPs (P1, N1, P2, N2, and the P3) over the frontal cortices. In the future, the gaming EEG system may also prove useful for measuring less reliable ERPs, such as the MMN, if the reliability of such ERPs can be boosted to the same level as late auditory ERPs.
authors: ARC Centre of Excellence in Cognition and its Disorders, Macquarie University , Sydney, NSW , Australia.
authors: Nicholas A
authors: NA
authors: Badcock
authors: Petroula
authors: P
authors: Mousikou
authors: Yatin
authors: Y
authors: Mahajan
authors: Peter
authors: P
authors: de Lissa
authors: Johnson
authors: J
authors: Thie
authors: Genevieve
authors: G
authors: McArthur
keywords: Auditory odd-ball; EEG; ERP; Emotiv EPOC; Intraclass correlation; MMN; Methods; Mismatch negativity; Signal processing; Validation
references: Dev Neuropsychol. 2005;27(2):183-215
references: 15753046
references: Psychophysiology. 2010 Jan 1;47(1):66-122
references: 19686538
references: Audiol Neurootol. 2000 May-Aug;5(3-4):235-46
references: 10859418
references: Clin Neurophysiol. 2011 May;122(5):934-41
references: 20869913
references: Behav Res Methods Instrum Comput. 2003 May;35(2):329-33
references: 12834093
references: Clin Neurophysiol. 2000 Feb;111(2):220-36
references: 10680557
references: Hear Res. 2012 Dec;294(1-2):82-94
references: 23103362
references: Doc Ophthalmol. 2012 Oct;125(2):149-59
references: 22843193
references: Psychophysiology. 2012 Nov;49(11):1617-21
references: 23013047
references: Int J Neurosci. 1995 Apr;81(3-4):249-64
references: 7628914
references: Dev Sci. 2009 Sep;12(5):768-83
references: 19702769
references: J Neurosci Methods. 2010 May 15;188(2):287-9
references: 20211649
references: Clin Neurophysiol. 2003 Nov;114(11):2061-70
references: 14580604
references: Electroencephalogr Clin Neurophysiol. 1996 May;100(3):250-60
references: 8681866
references: Brain Lang. 2008 Jan;104(1):75-88
references: 17412410
references: J Child Psychol Psychiatry. 2004 Oct;45(7):1235-45
references: 15335344
references: Dev Sci. 2007 Sep;10(5):565-75
references: 17683343
references: J Neurosci Methods. 2004 Mar 15;134(1):9-21
references: 15102499
references: Ear Hear. 1995 Feb;16(1):118-30
references: 7774765