Abstract
Objective To investigate the influence of high-motivated affect background on the holistic face processing and its neural mechanism. Methods Totally 26 subjects were instructed to perform composite-face process under the priming condition of three emotional pictures(food, neutral and fear). Results (1)Behavioral studies showed a significant interaction between emotion type and face combination(F(2, 50)=5.37, P=0.008). Composite-face effect was observed in neutral emotional condition due to the fact that the recognition accuracy of the misaligned face((90.21±11.20)%) was significantly higher than that of the aligned face((84.83±11.20)%, t(25)=3.95, P=0.001). However, the composite-face effect disappeared under the condition of high-motivated emotion. That is, there was no significant difference in the recognition accuracy of the misaligned faces ((87.88±10.28)%) and aligned faces((85.12±8.81)%, t(25)=1.93, P=0.065) under the condition of high-motivated negative emotion. Under the condition of high-motivated positive emotion, there was also no significant difference in the recognition accuracy between the misaligned faces((87.92±11.00)%) and aligned faces((88.33±8.89)%, t(25)=0.263, P=0.795). (2)According to the results of ERP, P3 components showed significant interaction between emotion type and face combination form(F(2, 50)=3.23, P=0.048). Under the neutral emotional condition, the P3 amplitude of aligned faces((3.46±1.26)μV) was significantly higher than that of misaligned faces((2.82±1.43)μV, F(1, 25)=5.28, P=0.03). In the case of high-motivated negative condition, there was no significant difference in P3 amplitude between aligned faces((3.21±1.16)μV) and misaligned faces((3.07±1.22)μV, F(1, 25)=0.53, P=0.476). The P3 amplitude of aligned faces((3.33±1.20)μV) and misaligned faces((3.42±1.40)μV) were also not significantly different under the condition of high-motivated positive affect(F(1, 25)=0.23, P=0.638). Conclusion The study shows a high correlation between face processing and emotional processing.Additionally, the emotional motivation has a stronger influence on face processing. Regardless of the emotional valence, high-motivated intensity affect can cause local attention bias and reduce the holistic processing level of the face, which is mainly manifested in the later cognitive processing stage. Key words: Face recognition; Holistic processes; Composite-face effect; High-motivated affect; Event-related potential
Published Version
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