L-Theanine and caffeine improve task switching but not intersensory attention or subjective alertness

被引：48

作者：

Einother, Suzanne J. L. ^{[1
]}

Martens, Vanessa E. G. ^{[1
]}

Rycroft, Jane A. ^{[2
]}

De Bruin, Eveline A. ^{[1
]}

机构：

[1] Unilever Res Labs, Sensat Percept & Behav, NL-3130 AC Vlaardingen, Netherlands

[2] Unilever R&D Colworth, Lipton Inst Tea, Bedford, England

来源：

APPETITE | 2010年 / 54卷 / 02期

关键词：

L-Theanine; Caffeine; Attention; Alertness; COGNITIVE PERFORMANCE; SELECTIVE ATTENTION; PSYCHOMOTOR PERFORMANCE; GREEN TEA; MOOD; COFFEE; COMBINATION; CONSUMPTION; HUMANS; STATE;

D O I：

10.1016/j.appet.2010.01.003

中图分类号：

B84 [心理学]; C [社会科学总论]; Q98 [人类学];

学科分类号：

03 ; 0303 ; 030303 ; 04 ; 0402 ;

摘要：

Tea ingredients L-theanine and caffeine have repeatedly been shown to deliver unique cognitive benefits when consumed in combination. The current randomized, placebo-controlled, double-blind, cross-over study compared a combination of L-theanine (97 mg) and caffeine (40 mg) to a placebo on two attention tasks and a self-report questionnaire before, and 10 and 60 min after consumption. The combination of L-theanine and caffeine significantly improved attention on a switch task as compared to the placebo, while subjective alertness and intersensory attention were not improved significantly. The results support previous evidence that L-theanine and caffeine in combination can improve attention. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：406 / 409

页数：4

共 35 条

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