TABLE 2.

Determination of the endpoint of insight stages.

Stage	Search interval	Post-stimulus period EEG and PSR search criteria
Stage I	80–120 ms	Location of P100 peak. Time points for decline of alpha and theta PSR, and peak of beta PSR.
Stage II	348–388 ms	Location P278 baseline. Location of overall global maximum of PSR in theta and alpha bands, and minimum of global beta PSR.
Stage III	500–540 ms	Location of P456 baseline. Location of overall global maximum of theta PSR, and minimum of alpha and beta PSR.
Stage IV	630–670 ms	Location of peak around 650 ms. Location of an overall minimum of theta and alpha PSR and the start of the decline of the beta PSR.
Stage V	860–1,000 ms	Start of the resting state EEG. Location of the middle of the quiescent period of theta and alpha PSR, and an overall maximum of beta PSR.