Contains the raw data and analysis scripts for this data set:
Wiens, S., Szychowska, M., Eklund, R., & Nilsson, M. E. (2017). Data on the auditory duration mismatch negativity for different sound pressure levels and visual perceptual loads. Data in Brief, 11, 159-164. https://doi.org/10.1016/j.dib.2017.02.007

Wiens et al. (2017) contained only aggregated data for these studies:

Szychowska, M., Eklund, R., Nilsson, M. E., & Wiens, S. (2017). Effects of sound pressure level and visual perceptual load on the auditory mismatch negativity. Neuroscience Letters, 640, 37-41. https://doi.org/10.1016/j.neulet.2017.01.001

Wiens, S., Szychowska, M., & Nilsson, M. E. (2016). Visual task demands and the auditory mismatch negativity: An empirical study and a meta-analysis. PLoS ONE, 11(1), e0146567. https://doi.org/10.1371/journal.pone.0146567

Content:
rawdata_EEG_bdf_2017.zip contains the raw eeg data files that were recorded with a biosemi system (www.biosemi.com). The files can be opened in matlab with the fieldtrip toolbox. 
https://www.mathworks.com/products/matlab.html
http://www.fieldtriptoolbox.org/

fieldtrip_mat*.zip contain the final, preprocessed individual data files. They can be opened with matlab.

fieldtrip_analysis*.zip contain all the matlab scripts that were used to process the erp data with the toolbox fieldtrip. http://www.fieldtriptoolbox.org/

Supplementary_Table_1.csv is the datafile in Wiens et al. (2017).