title: Latency as a region contrast: Measuring ERP latency differences with Dynamic Time Warping.
abstract: Methods for measuring onset latency contrasts are evaluated against a new method utilizing the dynamic time warping (DTW) algorithm. This new method allows latency to be measured across a region instead of single point. We use computer simulations to compare the methods' power and Type I error rates under different scenarios. We perform per-participant analysis for different signal-to-noise ratios and two sizes of window (broad vs. narrow). In addition, the methods are tested in combination with single-participant and jackknife average waveforms for different effect sizes, at the group level. DTW performs better than the other methods, being less sensitive to noise as well as to placement and width of the window selected.
authors.affiliation: Center for Cognitive Neuroscience and Cognitive Systems, School of Computing, University of Kent, Kent, UK.
authors.forename: A
authors.initials: A
authors.lastname: Zoumpoulaki
authors.affiliation: Center for Cognitive Neuroscience and Cognitive Systems, School of Computing, University of Kent, Kent, UK.
authors.forename: A
authors.initials: A
authors.lastname: Alsufyani
authors.affiliation: Helsinki Institute for Information Technology (HIIT), Aalto University, Laskut, Finland.
authors.forename: M
authors.initials: M
authors.lastname: Filetti
authors.affiliation: Institute of Psychiatry/Centre for Neuroimaging Science, Kings College London, London, UK.
authors.forename: M
authors.initials: M
authors.lastname: Brammer
authors.affiliation: Center for Cognitive Neuroscience and Cognitive Systems, School of Computing, University of Kent, Kent, UK.|School of Psychology, University of Birmingham, Birmingham, UK.
authors.forename: H
authors.initials: H
authors.lastname: Bowman
mesh_terms: D000465:Algorithms; D001921:Brain / Q000502:physiology*; D003198:Computer Simulation; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D011930:Reaction Time / Q000502:physiology*; D013997:Time Factors
keywords: Dynamic time warping; ERP latency; Fractional area; P300; Peak