Conflict cost
= Conflict cost
{title2=$C=\overline{RT}_{\rm incongruent}-\overline{RT}_{\rm congruent}$}
A performance contrast between conditions with greater and smaller response conflict. For <reaction time>, $C=\overline{RT}_{\rm incongruent}-\overline{RT}_{\rm congruent}$. A group advantage specific to conflict requires a difference of such contrasts, not just faster responses in both conditions.