Table 11. Summary of the results of Experiments 1–3. “Timing” and “Task at the time of stimulation” denote the two experimental factors, and the last column shows the outcome.

Exp	Montage	Timing	Activity at the time of stimulation	Effect
1	F7 – mastoid	During	Letter Flanker (executive demand: high)	Performance↓
2a,b	F7 – mastoid/supraorbital	Post	Simple categorization (executive demand: minimal)	Performance↑
3	F7 – mastoid	Post	Object name reversal (executive demand: high)	Performance↓

The table shows that the outcome can be predicted from the task, but not from the timing manipulation. ↓  =  decline; ↑  =  improvement.