The Brain Vision Analyzer package (BVA, Brain Products, Munich, Germany) and the open-source, MATLAB-based EEGLAB Toolbox (Delorme and Makeig, 2004) was used for data analysis. BVA was utilized for pre-processing of the data, computation of ERP waveforms and extraction of the peak amplitudes of the ERP components, while EEGLAB was used for computation of event-related time-frequency representations (TFRs) and extraction of event-related power measures from these TFRs, with additional functionality added to the toolbox as required.
