Digitising tablets and brain activity

This data forms the basis of research which compared the brain activity produced by freehand drawing on a tablet device and using a mouse Computer Aided Design. The original data have been converted from their native format (Labview .tdms and .log files) into .csv files in order to provide access with any .csv reader. They have been anonymized and named as SD for the freehand drawing sessions and SC for the CAD sessions. Each file represents the EEG recorded in a given session, where approximately 100 time epochs of interest, hereby called “traces” have been collected. Each time epoch, or trace, is centred upon the start of drawing movement or the mouse click, as described in the published paper. Each trace is stored in the .csv file as a column containing 2200 numbers, whose value is the actual voltage measured at the time Tn between the two electrodes placed on the scalp. The first column contains the actual values in seconds of Tn, from T0 to T2200. Where T1100 (= 1.1 seconds from the start of the trace) is the T0 mentioned in the paper. The voltage values are the values in Volt units measured at the A/D board. To obtain the voltage measures across the electrodes, each value has to be divided by the amplifier chain gain, which was 8000.