Comment on page
The CSV file has a header made of 2 lines. The first line contains information about the record and its data streams. The second line is a classic CSV header with the name of the columns.
The first line of the CSV file is a comma separated list of key and value pairs. The key is separated from the value by a colon. It looks like
key1:value1, key2:value2, key3:value3
Here is the meaning of each key and value pair:
title:foo, start timestamp:1623658701.491566, stop timestamp:1623658723.788441, headset type:INSIGHT, headset serial:7AEC4253, headset firmware:931, channels:28, sampling rate:128, samples:2855 , version:2.1,
The comma separated list of the column names of this CSV file.
The CSV file contains many columns. For clarity, we divide them into categories in this documentation. The exact content of your CSV file depends on the options you selected when you exported the record.
The name of the columns has the format PM.<name>.<value> The <name> is the name of a performance metric. There are 6 possible values: Engagement, Excitement, Stress, Relaxation, Interest, Focus. The <value> can be IsActive, Scaled, Raw, Min, Max.
Examples: PM.Engagement.Min, PM.Stress.IsActive, PM.Relaxation.Scaled
To scale the Raw value post hoc for a given recording, you can use the Min and Max values at the end of the recording (where they are most stable) and the following equation:
AVERAGE = (MAX + MIN)/2.0;
RANGE = MAX - MIN;
scaled = 1.0 / (1 + exp( -5.0 * (raw - AVERAGE) / RANGE));
There is one additional column, named "PM.LongTermExcitement". Long Term Excitement is a metric derived from the Excitement metric. It is a better measurement of overall mood, rather than acute changes in mental arousal.
The possible values for MC.Action are:
The file contains 5 columns for each EEG sensor of the headset. The name of the columns has the format POW.<sensor>.<band>
The bands are:
- Theta: 4-8 Hertz
- Alpha: 8-12 Hertz
- BetaL: 12-16 Hertz
- BetaH: 16-25 Hertz
- Gamma: 25-45 Hertz
For example, for the EEG sensor AF3, the file has 5 columns: POW.AF3.Theta, POW.AF3.Alpha, POW.AF3.BetaL, POW.AF3.BetaH, POW.AF3.Gamma.