Based on the idea that intentions have different penetrability to perception and thought,four Stroop-like tasks,AA,AW,WA,and WW are used.Event-related brain potentials are recorded as participants completed these tasks,and standardized low resolution brain electromagnetic tomography（sLORETA） is used to localize the sources at specific time points.These results show that there is an interference effect in the AA and WA tasks,but not in the AW or WW tasks.The activated brain areas related to the interference effect in the AA task are the PFC（prefrontal cortex） and ACC（anterior cingulated cortex）,and PFC activation takes place prior to ACC activation,but only in WA task.Combined with previous results,a new neural mechanism of cognitive control is proposed.
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