Distinct patterns of human olfactory learning: specificity, transfer, and persistence across odorant types

This study conducted three experiments using different olfactory stimuli (including mixture, enantiomer, and concentration discrimination) for unilateral olfactory training, systematically exploring the differences in specificity, generalization, and persistence of training effects. A total of 96 healthy non-smoking participants were recruited for the study, of which 48 completed the pretest, training and post-training tests, and the remaining 48 provided ratings for odor stimuli valence, intensity and similarity. The experimental data includes: Unilateral olfactory discrimination accuracy (triangle task); Subjective rating of odor intensity and valence (7-point Likert scale) in pretest and post-training tests; Discrimination accuracy from multiple post-training tests (including Days N, N+1, N+3, N+7, and N+14); Rating data on the valence, intensity, and perceptual similarity of different odor stimuli (7-point Likert scale).