Department of Kinesiology, University of Georgia, Athens, Georgia, USA.
Int J Neurosci. 2009;119(8):1239-58. doi: 10.1080/00207450802333987.
This double-blind, placebo-controlled, within-subjects (N = 17) experiment compared the sensitivity to change of the cognitive performance and mood measures of mental energy following consumption of either a moderate dose of caffeine (200 mg), a small amount of carbohydrate (50 g white bread), or both. Caffeine improved mood and performance. The sensitivity to change of the mood and cognitive measures did not differ in response to the three treatments (all p values > .05). The mood and cognitive measures of mental energy used here have similar sensitivity to detecting change in response to caffeine and carbohydrate.
本双盲、安慰剂对照、自身对照实验（N = 17）比较了摄入中等剂量咖啡因（200 毫克）、少量碳水化合物（50 克白面包）或两者后，对精神能量的认知表现和情绪测量变化的敏感性。咖啡因改善了情绪和表现。三种处理方式的情绪和认知测量变化的敏感性没有差异（所有 p 值均大于 0.05）。此处使用的精神能量的情绪和认知测量在检测咖啡因和碳水化合物反应的变化方面具有相似的敏感性。
