Wudarski Thomas J, Doty Richard L
Smell and Taste Center, University of Pennsylvania Medical Center, Philadelphia, PA 19104-4283, USA.
Percept Mot Skills. 2004 Feb;98(1):192-6. doi: 10.2466/pms.98.1.192-196.
Olfactory threshold measures are influenced by such factors as odorant species, diluent type, psychophysical paradigm, and stimulus-presentation procedure. In this study, we compared phenyl ethyl alcohol odor-detection thresholds obtained using 120-ml glass sniff bottles to those obtained using 120-ml plastic squeeze bottles. Although these presentation media are commonly employed in published studies, there has never been a formal comparison of values obtained using them. 10 male and 10 female subjects were tested on two threshold test sessions, one for each type of bottle. Order of sessions was systematically counterbalanced and completed on the same day for a given subject, with a minimum of 30 min. elapsing between sessions. A seven-reversal, single-staircase threshold procedure was employed. Although the threshold values were similar for the two procedures, slightly lower thresholds were obtained using the glass sniff bottles [respective M (SEM) log vol/vol values = -6.61 (.20) and -6.13 (.24)]. These data suggest that, while threshold values using these two presentation procedures can be roughly compared across studies, accurate comparisons may require a slight mathematical adjustment.
嗅觉阈值测量会受到多种因素的影响，如气味物质种类、稀释剂类型、心理物理学范式以及刺激呈现程序等。在本研究中，我们比较了使用120毫升玻璃嗅瓶和120毫升塑料挤压瓶获得的苯乙醇气味检测阈值。尽管这些呈现介质在已发表的研究中常用，但从未对使用它们获得的值进行过正式比较。对10名男性和10名女性受试者进行了两次阈值测试，每种瓶子各进行一次测试。测试顺序进行了系统的平衡，并在同一天为给定受试者完成，两次测试之间至少间隔30分钟。采用了七次反转的单阶梯阈值程序。尽管两种程序的阈值相似，但使用玻璃嗅瓶获得的阈值略低[各自的M（SEM）对数体积/体积值=-6.61（0.20）和-6.13（0.24）]。这些数据表明，虽然在不同研究中可以大致比较使用这两种呈现程序获得的阈值，但准确比较可能需要进行轻微的数学调整。
