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Chemical Senses 11: 259-264,
© 1986

research-article

Influence of intertrial interval and sniff-bottle volume on phenyl ethyl alcohol odor detection thresholds

Richard L. Doty1,2,3, Thomas P. Gregor1,3 and R.Gregg Settle1

1Smell and Taste Center, School of Medicine, University of Pennsylvania Philadelphia, PA 19104, USA 2Department of Physiology, School of Medicine, University of Pennsylvania Philadelphia, PA 19104, USA 3Department of Otorhinolaryngology and Human Communication, School of Medicine, University of Pennsylvania Philadelphia, PA 19104, USA

The relative influences of intertnal interval and sniff-bottle volume on phenyl ethyl alcohol odor detection thresholds were determined in two experiments. In the first, thresholds were measured for 20 men and 20 women using 8, 16, 32 and 64 s intertrial intervals within a repeated measures counterbalanced design. No significant influence of intertnal interval was apparent, although females evidenced lower average thresholds than males. In the second, thresholds were established for 24 men and 24 women in a similar design using sniff-bottles of 65, 120 and 285 ml volumes. Sniff-bottle volume was inversely related to the magnitude of the detection threshold measures. These findings suggest that (i) rigid control of intertrial interval is not necessary for the meaningful determination of phenyl ethyl alcohol detection thresholds and (ii) sniff-bottle volume is significantly related to such measures.


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