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This opens the 2x8 layout view:
There are no saturations in these data, the signal looks fine.
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Exclude bad data
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Top left: bad optode contact; there is hair trapped under the optode. You can try to resolve this by placing a headband over the optode to keep it closer to the skin or make the strap tighter. Optode 1 and also a little bit 5 and 3 in this example shows the effect of hair. The sharp change towards the end of the x-axis shows an adjustment where the hair was moved out of the way.
Makeup needs to be removed because it reflects a lot of light and will distort the signal.
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Top right: Saturated signals mean the signal is larger than the machine can handle and this signal cannot be recovered. We want a maximum of 3,500 mV. Therefore, we need to make sure we prevent this issue. This can be done prior to the experiment by reducing the gain or the light intensity. If this issue remains undetected until after the experiment, the optode where there is saturation will need to be eliminated from the analysis.
Lower left: spike from motion artifact. Can either eliminate (preferred) or correct for it. Try to prevent by tightening the strap without tension but less possibility to move.
Lower right: good signal.
Filtering
Now go to the bottom tool bar and click the tab “Refine”
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