Fig. 1.

Lateralization accuracies after prolonged exposures to phenylethyl alcohol in 24 normosmic individuals (17 females, mean age ± SD = 25.0 ± 2.8 y). In each trial, they were dichorhinically presented with two concentrations of phenylethyl alcohol that formed a 4:1 disparity, and instructed to continuously inhale through the nose and exhale through the mouth until a timer prompted them to stop (for a duration of 5 min to 6 min), at which point they were asked to verbally report which nostril smelled a higher concentration or a stronger odor. Half of them were exposed to 4% vol/vol phenylethyl alcohol in one nostril and 1% vol/vol in the other; the other half were exposed to 0.8% vol/vol in one nostril and 0.2% vol/vol in the other. Each completed eight trials, with a 2-min break in between two trials. In each box and whisker plot, the central line denotes the mean, and the bottom and top edges of the box indicate the 25th and 75th percentiles. The ends of the whiskers represent 90% CI. Each circle represents an individual.