The question of whether or not neural activity patterns recorded in the olfactory centres of the brain correspond to olfactory perceptual measures remains unanswered. To address this question, we studied olfaction in honeybees Apis mellifera using the olfactory conditioning of the proboscis extension response. We conditioned bees to odours and tested generalisation responses to different odours...

Experiments were conducted in which observers learned to classify simple perceptual stimuli into low-variability and high-variability categories. Similarities between objects were measured in independent psychological-scaling tasks. The results showed that observers classified transfer stimuli into the high-variability categories with greater probability than was predicted by a baseline version...

Our study investigates the perceptual feature similarity between different lexicons based on visual perception of the words and theirs representation through an observation sequence. We confirm that it is possible to apply databases, which are similar in terms of morphological/perceptual features for improving the recognition task. Having selected Portuguese and French words from legal amounts ...

A study of half-rhymes (HR's) in Romanian poetry reveals that poets systematically prefer HR's corresponding to certain common phonological processes: final devoicing, post-nasal voicing, nasalplace neutralization, stressless vowel reduction, coda cluster simplification, nasalized vowel centralization, liquid metathesis. The striking observation is that none of these processes operates in Roman...

Human similarity judgments are inconsistent with Euclidean, Hamming, Mahalanobis, and the majority of measures used in the extensive literatures on similarity and dissimilarity. From intrinsic properties of brain circuitry, we derive principles of perceptual metrics, showing their conformance to Riemannian geometry. As a demonstration of their utility, the perceptual metrics are shown to outper...