Grzybowski Szczepan J, Wyczesany Miroslaw, Kaiser Jan
Psychophysiology Laboratory, Institute of Psychology, Jagiellonian University, Kraków, Poland.
Psychophysiology Laboratory, Institute of Psychology, Jagiellonian University, Kraków, Poland.
Biol Psychol. 2014 May;99:137-49. doi: 10.1016/j.biopsycho.2014.01.002. Epub 2014 Feb 2.
The study investigated brain responses to emotional and neutral adjectives within contexts of varying emotional valence. Participants were randomly assigned to 3 context groups where they viewed random sequences of emotional and neutral adjectives intermixed with: emotional pictures (emotional context), neutral pictures (neutral context) and blank screens (zero context). Within the emotional context group the P3 potential was more pronounced in response to positive than either negative or neutral adjectives, and positive picture context impacted positive and negative adjectives differently. In the neutral context group the P2 and P3 potentials were greater in response to the positive adjectives as compared to the neutral ones. There was also a greater negativity of the N400 potential in response to the neutral adjectives. Within the zero context group only the N400 effect was visible. The seeming preference for positive words can be explained in terms of the specific positivity offset phenomenon.
该研究调查了在不同情绪效价背景下大脑对情绪性和中性形容词的反应。参与者被随机分配到3个背景组，在这些组中他们观看情绪性和中性形容词的随机序列，并与以下内容混合：情绪性图片（情绪背景）、中性图片（中性背景）和空白屏幕（零背景）。在情绪背景组中，与消极或中性形容词相比，对积极形容词的P3电位更明显，并且积极图片背景对积极和消极形容词的影响不同。在中性背景组中，与中性形容词相比，对积极形容词的P2和P3电位更大。对中性形容词的N400电位也有更大的负性。在零背景组中，仅可见N400效应。对积极词汇的明显偏好可以用特定的积极偏移现象来解释。
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