Basic principles of work the NeuroLatency App.
NeuroLatency connects with MindWave Mobile 2 or “+” to get a raw electroencephalogram.
After the test is started, NeuroLatency is going sound stimuli every period of time (period length set in settings) in accordance with the ODDBALL PARADIGM method.
The stimulus may be of two types: ordinary and target. Ordinary stimulus sounds frequently and it does not need the reaction of the user. Target stimulus sounds infrequently and it needs a reaction from a user (to press the big button on-screen). In test maybe the third type of stimulus – deviant stimulus, but it not obligatory (all types of stimuli set in settings).
After the end of the test NeuroLatency saving the recorded electroencephalogram data and stimuli in the GDF file. And then, using the method of coherent averaging, NeuroLatency from saved data makes a graph of the EVENT-RELATED POTENTIAL.
On a graph that presents the test result, the user will see event-related potential with components: P1, N1, P2, N2, P3 (aka P300), and N4. In images above it is used NEGATIVE UP view (“Positive value up” switch off in settings).
If it needs, the user can recheck the result by analyzing saved GDF files in independent apps (exp. OpenVIBE or EEGLAB for MATLAB).
For the additional verify reality of the test result, I propose to make a simple scientific experiment. First, you do test with sound on. Second, you do test with sound off. And then you can compare the results of this experiment. As a variant, to put a MindWave on the head one person, and earphone and NeuroLatency to give to another person for press button. In images below it is used POSITIVE UP view (“Positive value up” switch on in settings).
In the test without a sound, the event-related potential components are not presented.