Step # 4: To use the Automatic Artifact procedure select a “Good” or artifact free and representative samples of EEG for quantitative analysis.

 

Highlight Automatic Selection.   We will use the 1^st 5 seconds of selected EEG as a template of “Good” EEG, this is only for illustration and to note that the first 5 seconds is generally not a good period to select from.  Highlight Clear All Selections and then select a different template using the left mouse button.  A good reliability criteria for EEG is split-half reliability ≥ .9 and epoch lengths ≥  60 seconds.  

 

 

4b-  The Default multiplier is 1.0.   Click O.K. and the FFT and Z scores of the edited selections will be displayed. 

 

4c- Edit time is now 1 min. & 22 seconds and Reliability is improved.   Re-scan the EEG to de-select segments that may have artifact and to select Good and representative EEG segments that may have been omitted.

 

           

 

 

4d-  To change the template selection of “Good” EEG, highlight “Clear All Selections” and then select a different template selection.   To change the Cut-Off highlight “Clear Automatic Selections” and repeat steps 4a and 4b.

 

 

4e- Click O.K. using the 1.25 Multiplier Cut-Off and evaluate Epoch Length and Reliability Changes and Scroll through the EEG Selections as an Expert Conventional Electroencephalographer Would: