Caffeine improves left hemisphere processing of positive words.
Caffeine improves left hemisphere processing of positive words.
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DOI：
10.1371/journal.pone.0048487
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Lux V
中科院分区：
文献类型：
--
作者：
Kuchinke L;Lux V
在情绪词识别中，积极词的优势是已知的，因为与情绪中性词相比，积极词的处理速度一直更快，错误更少。对于负面词汇来说，类似的优势并不明显。分开视野研究的结果表明，语言占主导地位的左半球有一种特殊性。目前的研究检验了这一效应，结果表明，与安慰剂对照组相比，摄入咖啡因进一步提高了对积极的、但不是消极的或中性的刺激的识别能力。由于这一效应仅存在于右视野/左半球，而且基于咖啡因摄取与多巴胺能传递之间的密切联系，这一结果表明多巴胺能解释情绪词识别中的积极优势。
A positivity advantage is known in emotional word recognition in that positive words are consistently processed faster and with fewer errors compared to emotionally neutral words. A similar advantage is not evident for negative words. Results of divided visual field studies, where stimuli are presented in either the left or right visual field and are initially processed by the contra-lateral brain hemisphere, point to a specificity of the language-dominant left hemisphere. The present study examined this effect by showing that the intake of caffeine further enhanced the recognition performance of positive, but not negative or neutral stimuli compared to a placebo control group. Because this effect was only present in the right visual field/left hemisphere condition, and based on the close link between caffeine intake and dopaminergic transmission, this result points to a dopaminergic explanation of the positivity advantage in emotional word recognition.
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作者：
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通讯作者：
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DOI：
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发表时间：
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期刊：
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影响因子：
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