Abstract
ERPLAB toolbox is a freely available, open-source toolbox for processing and analyzing event-related potential (ERP) data in the MATLAB environment. ERPLAB is closely integrated with EEGLAB, a popular open-source toolbox that provides many EEG preprocessing steps and an excellent user interface design. ERPLAB adds to EEGLAB’s EEG processing functions, providing additional tools for filtering, artifact detection, re-referencing, and sorting of events, among others. ERPLAB also provides robust tools for averaging EEG segments together to create averaged ERPs, for creating difference waves and other recombinations of ERP waveforms through algebraic expressions, for filtering and re-referencing the averaged ERPs, for plotting ERP waveforms and scalp maps, and for quantifying several types of amplitudes and latencies. ERPLAB’s tools can be accessed either from an easy-to-learn graphical user interface or from MATLAB scripts, and a command history function makes it easy for users with no programming experience to write scripts. Consequently, ERPLAB provides both ease of use and virtually unlimited power and flexibility, making it appropriate for the analysis of both simple and complex ERP experiments. Several forms of documentation are available, including a detailed user’s guide, a step-by-step tutorial, a scripting guide, and a set of video-based demonstrations.
Highlights
The event-related potential (ERP) technique is widely used in basic and translational research on sensory, cognitive, affective, and motor processes (Hillyard and Picton, 1987; Rugg and Coles, 1995; Kutas and Dale, 1997; Luck, 2005, 2012b; Luck and Kappenman, 2012)
ERPs provide a non-invasive means of measuring brain activity in humans, and its millisecond temporal resolution and coarse spatial resolution complement the coarse temporal resolution and fine spatial resolution of functional magnetic resonance imaging
A significant impediment to the optimal use of these systems has been the lack of high quality, full featured, and widely available ERP analysis tools
Summary
The event-related potential (ERP) technique is widely used in basic and translational research on sensory, cognitive, affective, and motor processes (Hillyard and Picton, 1987; Rugg and Coles, 1995; Kutas and Dale, 1997; Luck, 2005, 2012b; Luck and Kappenman, 2012). The last decade has seen an explosion in the development of commercial systems for recording the electroencephalogram (EEG), including inexpensive systems of good quality and more expensive systems with greatly improved features and performance (e.g., driven right leg circuits, 24- or 32-bit resolution, ultrahigh input impedance). This has led to a dramatic increase in the number of installed EEG/ERP systems. It is designed to provide a convenient workflow, a fast learning curve, ease of use for inexperienced researchers, and virtually limitless power and flexibility for experienced researchers The purpose of this Technology Report is to provide an overview of this package, including the underlying design principles and the core features
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