Correspondence Between Three Olfactory Tests and Suprathreshold Odor Intensity Ratings

Koskinen, Sari; Vento, Seija; Malmberg, Henrik; Tuorila, Hely

doi:10.1080/00016480410015776

Cited by 23 publications

(15 citation statements)

References 11 publications

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“…The designs implemented by Popp et al (2004); Lorig et al (1999) share many similarities, including the method by which odorant dilutions are calculated, as well as the use of multiple successive air streams to ensure odor dilution. In addition, Lorig et al noted that the odor can be delivered to the participant in a variety of ways with little alteration required; in most previous research a face mask has been used, but modification to a sniff port into headspace would be trivial.…”

Section: Discussionmentioning

confidence: 99%

“…Johnson & Sobel's (2007) considerably more sophisticated olfactometer also implemented MFCs by means of calculating concentrations. However, they also commented that threshold testing using their olfactometer could be compromised by cross-odor contamination (Johnson & Sobel, (Koskinen et al, 2004); the olfactometer design could readily implement these delineations, owing to its large range. Provided with proper instructions, participants are capable of making minute concentration changes to establish absolute thresholds.…”

Section: Discussionmentioning

confidence: 99%

“…Our olfactometer design is simple and similar to several preexisting olfactometer setups (Davies & Davies, 1999;Johnson & Sobel, 2007;Lorig et al, 1999;Popp et al, 2004). The olfactometer is a "Dravnieks-style" olfactometer ( Fig.…”

Section: Olfactometer Designmentioning

confidence: 99%

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A comparison of sniff bottle staircase and olfactometer-based threshold tests

2012

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Olfactometers have been gaining popularity as research tools, but they have yet to replace established testing procedures in a variety of laboratory and clinical settings, including absolute threshold tests. In this research, we designed and operated a simple olfactometer with which to assess threshold. To do this, we used a method-of-adjustment test that was compared to the three-alternative forced choice ascending sniff bottle staircase method, which is currently a standard threshold test procedure. We found that the olfactometer threshold test correlated highly with the staircase method, and that it possessed suitable test-retest reliability. The advantages of the olfactometer threshold test include faster test time and reduced cleaning and reassembly demands. Future use of the olfactometer in olfactory identification and/or detection thresholds amongst odors is also outlined.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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A comparison of sniff bottle staircase and olfactometer-based threshold tests

2012

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“…Compounds were chosen because they are non-toxic, water soluble and used extensively in clinical testing [13,16,32]. Vanillin, phenethyl alcohol and l-menthol were reagent grade (Sigma Chemical Co., St. Louis, MO) and isopropyl alcohol was pharmaceutical grade (Topco Associates, Skokie, IL).…”

Section: Stimuli and Labelsmentioning

confidence: 99%

Characteristic component odors emerge from mixtures after selective adaptation

Goyert

Frank

Gent

et al. 2007

Brain Research Bulletin

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Humans cannot reliably identify the distinctive characteristic odors of components in mixtures containing more than three compounds. In the present study we demonstrate that selective adaptation can improve component identification. Characteristic component odors, lost in mixtures, were identifiable after presenting other mixture constituents for a few seconds. In mixtures of vanillin, isopropyl alcohol, l-menthol and phenethyl alcohol, this rapid selective adaptation unmasked each component. We suggest that these findings relate directly to how olfactory qualities are coded: olfactory receptors do not act as detectors of isolated molecular features, but likely recognize entire molecules closely associated with perceived olfactory qualities or "notes." Rapid and focused activation of a few distinct receptor types may dominate most odor percepts, emphasizing the importance of many dynamic and specific neural signals. An interaction between two fundamental coding strategies, mixture suppression and selective adaptation, with hundreds of potential olfactory notes, explains humans experiencing the appearance and disappearance of identifiable odors against ambient mixture backgrounds.

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“…As several measurements were performed after exposure, the whole test would have been too time-consuming in our experiment. In another study, the correlation between SniYn' Sticks nbutanol threshold and three diVerent identiWcation tests was weak (Koskinen et al 2004).…”

Section: Discussionmentioning

confidence: 98%