A COMPARISON OF THE DETECTION THRESHOLDS OF ODOR MIXTURES AND THEIR COMPONENTS
A COMPARISON OF THE DETECTION THRESHOLDS OF ODOR MIXTURES AND THEIR COMPONENTS
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DOI：
10.1093/chemse/16.6.651
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发表时间：
1991-12-01
期刊：
影响因子：
3.5
通讯作者：
HUDSON, R
中科院分区：
文献类型：
--
作者：
LASKA, M;HUDSON, R
本研究的目的是调查气味混合物的感知是否与其组分的感知不同，涉及（i）检测阈值测量的可靠性和（ii）阈值本身。检测阈值为各种未混合的气味和3-，6-或12-组分的混合物，共44名受试者，反复测试在五个单独的会议使用嗅瓶和上升的楼梯方法。混合物的阈值测定被认为是可靠的，为未混合的物质，与内和个体间的变化阈值实际上随着刺激的复杂性增加而减少。四种混合物的阈值进行了系统的比较，在混合和未混合状态的组件没有提供证据的低加性的妥协或补偿的影响，而是建议一个积极的，阈下的组件之间的相互作用，甚至可能增强。最后，在整个测试过程中看到个体阈值分数的显著改善，有经验的小组成员表现出最稳定的表现。
It was the purpose of the present study to investigate whether the perception of odour mixtures differs from the perception of their components with regard to (i) the reliability of detection threshold measurements and (ii) the threshold values themselves. Detection thresholds for a variety of unmixed odorants and 3-, 6- or 12-component mixtures were determined for a total of 44 subjects, tested repeatedly in five separate sessions using sniff bottles and an ascending staircase method. Threshold determinations for the mixtures were found to be as reliable as for the unmixed substances, with intra- and interindividual variability in threshold values actually decreasing with increasing stimulus complexity. The four mixtures for which a systematic comparison of the threshold values of components in the mixed and unmixed state was conducted failed to provide evidence for the hypo-additive effects of compromise or compensation, but rather suggested a positive, sub-threshold interaction between components and possibly even enhancement. Finally, a significant improvement in individual threshold scores was seen across test sessions, with experienced panelists showing the most stable performance.