Buckalew L W, Rizzuto A P
Aviat Space Environ Med. 1984 Aug;55(8):731-4.
Beneficial effects of exposure to negative air ions have been suggested, to include improved performance, mood, attention, and physiological condition. Existing support is clouded by methodological problems of control and standardization in treatment and equipment. This study investigated effects of negative ions produced by a commercially marketed air purification device on grip magnitude, coding, motor dexterity, reaction time, tracking, pulse, blood pressure, and temperature. Two groups of 12 males were exposed to 6 continuous h of either negative or "normal" ion environments under a double blind condition. Repeated measures (0,3,6 h) on each variable were obtained. MANOVA applied to change scores revealed no differences between groups, and 0 vs. 3 and 0 vs. 6-h group differences showed no significant alteration in any measure. Negative ions generated by an air purification device were concluded to produce no general or specific alteration of cognitive or psychomotor performance or physiological condition.
有研究表明，接触负离子具有有益效果，包括提高工作表现、改善情绪、增强注意力以及改善生理状况。然而，现有的支持证据因治疗和设备控制及标准化方面的方法学问题而变得模糊不清。本研究调查了一种商业销售的空气净化设备产生的负离子对握力大小、编码、运动敏捷性、反应时间、追踪能力、脉搏、血压和体温的影响。两组各12名男性在双盲条件下分别暴露于负离子环境或“正常”离子环境6小时。对每个变量进行重复测量（0、3、6小时）。对变化分数进行的多变量方差分析显示两组之间没有差异，0小时与3小时以及0小时与6小时组间差异表明任何测量指标均无显著变化。得出的结论是，空气净化设备产生的负离子不会对认知或心理运动表现或生理状况产生一般或特定的改变。
