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Single-subject analysis of N400 event-related potential component with five different methods
Department of Psychology and Speech-Language Pathology, and Turku Brain and Mind Center, University of Turku, Turku, Finland / Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Finland.
Department of Mathematics and Statistics, University of Turku, Finland / Department of Computer Science, Aalto University, Espoo, Finland.
Department of Perioperative Services, Intensive Care and Pain Medicine, Turku University Hospital, Finland / Turku PET Centre, University of Turku and Turku University Hospital, Finland.
Department of Psychology and Speech-Language Pathology, and Turku Brain and Mind Center, University of Turku,Finland.
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2019 (Engelska)Ingår i: International Journal of Psychophysiology, ISSN 0167-8760, E-ISSN 1872-7697, Vol. 144, s. 14-24Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

There are several different approaches to analyze event-related potentials (ERPs) at single-subject level, and the aim of the current study is to provide information for choosing a method based on its ability to detect ERP effects and factors influencing the results. We used data from 79 healthy participants with EEG referenced to mastoid average and investigated the detection rate of auditory N400 effect in single-subject analysis using five methods: visual inspection of participant-wise averaged ERPs, analysis of variance (ANOVA) for amplitude averages in a time window, cluster-based non-parametric testing, a novel Bayesian approach and Studentized continuous wavelet transform (t-CWT). Visual inspection by three independent raters yielded N400 effect detection in 85% of the participants in at least one paradigm (active responding or passive listening), whereas ANOVA identified the effect in 68%, the cluster-method in 59%, the Bayesian method in 89%, and different versions of t-CWT in 22–59% of the participants. Thus, the Bayesian method was the most liberal and also showed the greatest concordance between the experimental paradigms (active/passive). ANOVA detected significant effect only in cases with converging evidence from other methods. The t-CWT and cluster-based method were the most conservative methods. As we show in the current study, different analysis methods provide results that do not completely overlap. The method of choice for determining the presence of an ERP component at single-subject level thus remains unresolved. Relying on a single statistical method may not be sufficient for drawing conclusions on single-subject ERPs. 

Ort, förlag, år, upplaga, sidor
Elsevier, 2019. Vol. 144, s. 14-24
Nyckelord [en]
Data analysis, Electroencephalography, Event-related potentials, N400 evoked potential, Statistical data interpretation, adult, analysis of variance, article, continuous wavelet transform, controlled study, drawing, electroencephalogram, event related potential, evoked response, female, human, human experiment, major clinical study, male, mastoid
Nationell ämneskategori
Neurovetenskaper
Forskningsämne
Kognitiv neurovetenskap och filosofi
Identifikatorer
URN: urn:nbn:se:his:diva-17539DOI: 10.1016/j.ijpsycho.2019.06.012ISI: 000488144500003PubMedID: 31228496Scopus ID: 2-s2.0-85070079873OAI: oai:DiVA.org:his-17539DiVA, id: diva2:1343269
Tillgänglig från: 2019-08-16 Skapad: 2019-08-16 Senast uppdaterad: 2019-11-08Bibliografiskt granskad

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