Effects of Caffeine and Noise on Mood, Performance and Cardiovascular Functioning
Effects of Caffeine and Noise on Mood, Performance and Cardiovascular Functioning
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咖啡因和噪音对情绪、表现和心血管功能的影响
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发表时间：
1997
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影响因子：
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通讯作者：
P. Brockman
中科院分区：
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作者：
Andrew P. Smith;H. Whitney;Marie Thomas;K. Perry;P. Brockman
本研究旨在探讨咖啡因和噪音对情绪、心理和心血管功能的影响。106名年轻人（平均年龄21.2岁）参加了这项研究。受试者被分配到由噪音/安静和饮料（含咖啡因的咖啡，不含咖啡因的咖啡和果汁）条件相结合的六组之一。受试者熟悉任务，然后完成饮酒前基线阶段（在安静中进行）。然后，受试者被给予含咖啡因的咖啡（1.5 mg/kg咖啡因），不含咖啡因的咖啡或果汁。饮用饮料后1小时，受试者在噪声（75 dBA的综合噪声，包括语音、音乐和机械噪声）或安静环境中重新接受测试。暴露在噪音中的受试者感到更加焦虑，血压也有所升高。他们在认知警觉任务中的表现也随着时间的推移而下降。咖啡因没有显著的主要影响，尽管含咖啡因的咖啡组的简单反应时间最快。咖啡因并没有改变噪音对情绪、心血管功能或持续注意力的影响。事实上，饮料和噪音之间唯一的相互作用是在回忆和识别记忆任务中发现的，咖啡因/噪音组比无咖啡因/噪音组的记忆表现更好。总的来说，结果表明，低水平的咖啡因不会增加在压力情况下观察到的行为和生理变化。© 1997 John Wiley & Sons，Ltd.
An experiment was conducted to examine the effects of caffeine and noise on mood, mental performance and cardiovascular function. One hundred and six young adults (mean age 21·2 years) took part in the study. Subjects were assigned to one of six groups formed by combining noise/quiet and drink (caffeinated coffee, decaffeinated coffee and fruit juice) conditions. Subjects were familiarized with the tasks and then completed a pre‐drink baseline session (conducted in the quiet). Subjects were then given either caffeinated coffee (1·5 mg/kg caffeine), decaffeinated coffee or fruit juice. Following consumption of the drink subjects were re‐tested 1 h later, either in noise (75 dBA conglomerate noise, consisting of speech, music and machinery noise) or in quiet. The subjects exposed to noise felt more anxious and showed an increase in blood pressure. Their performance of a cognitive vigilance task also declined over time. There were no significant main effects of caffeine, although simple reaction time was quickest in the caffeinated coffee group. Caffeine did not modify the effects of noise on mood, cardiovascular functioning or sustained attention. Indeed, the only interaction between drinks and noise was found in recall and recognition memory tasks, with the caffeine/noise group having better memory performance than the decaffeinated/noise subjects. Overall, the results show that low levels of caffeine do not increase the behavioural and physiological changes observed in a stressful situation. © 1997 John Wiley & Sons, Ltd.