Abstract
Research has shown that anger faces represent a potent motivational incentive for individuals with high implicit power motive (nPower). However, it is well known that anger expressions can vary in intensity, ranging from mild anger to rage. To examine nPower-relevant emotional intensity processing in anger faces, an ERP oddball task with facial stimuli was utilized, with neutral expressions as the standard and targets varying on anger intensity (50%, 100%, or 150% emotive). Thirty-one college students participated in the experiment (15 low and 16 high nPower persons determined by the Picture Story Exercise, PSE). In comparison with low nPower persons, higher percentage of correct responses was observed for high nPower persons when both groups discriminated low-intensity (50% intensity) anger faces from neutral faces. ERPs between 100% and 150% anger expressions revealed that high-intensity (150%) anger expressions elicited larger P3a and late positive potential (LPP) amplitudes relative to prototypical (100% intensity) anger expressions for power-motivated individuals. Conversely, low nPower participants showed no differences at both P3a and LPP components. These findings demonstrate that persons with high nPower are sensitive to intensity changes in anger faces and their sensitivity increases with the intensity of anger faces.
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