This paper presents a simple method for segmenting colour regions into categories like red, green, blue, and yellow. We are interested in studying how colour categories influence colour selection during scientific visualization. The ability to name individual colours is also important in other problem domains like real-time displays, user-interface design, and medical imaging systems. Our algor...

To examine perceptual similarity in cross-language speech perception as a multidimensional metric, an AXB classification test using nasal consonants from Malayalam ([m], [n+ ], [n], [÷], [ø], [N]) was administered to three sets of listener groups with common coronal nasal inventories: dental-retroflex (Marathi, Punjabi), alveolar-retroflex (Tamil, Oriya), and alveolar (Bengali, American English...

Introduction: Attention deficit hyperactivity disorder (ADHD) is one of the most common childhood psychiatric disorders which is characterized by poor attention and subsequently lower learning capacities comparing with normal children. The purpose of this study was to compare the effectiveness of neurofeedback and perceptual-motor exercises as two common non-pharmacological treatments on visual...

A variety of studies have demonstrated that organizing stimuli into categories can affect the way the stimuli are perceived. One such effect is the perceptual magnet effect, in which discriminability between vowels is reduced near prototypical vowel sounds. We present a Bayesian model to explain why this reduced discriminability might occur: it arises as a consequence of optimally solving the s...

In this note we discuss three notions of dimension for triangulated categories: Rouquier dimension, diagonal and Serre dimension. We prove some basic properties these dimensions, compare them open problems.

This paper deals with perceptual identification and differentiation of five Romance languages, namely French, Italian, Spanish, Portuguese and Romanian. Previous studies have investigated human capability to identify spoken samples in unknown languages after a relatively brief exposure. Moreover, they have shown that subjects use perceptual categories and adapt foreign categories to their own c...

We investigate whether the universal character of colour categories can be explained as the result of a category acquisition process under influence of linguistic communication. A brief overview is presented of the different positions in explaining the mechanisms of colour category acquisition (or perceptual categories in general). We introduce a computational model to study the acquisition of ...

We are able to use many types of information available in the environment when categorizing or making inferences. This research explores how two types of information—perceptual and conceptual—may be used to different extents in different tasks. The method takes advantage of the distinction between animate and artifact categories. In two experiments, adult participants were given perceptual and ...

Automatic labeling of prosodic features is an important topic when constructing large speech databases for speech synthesis or analysis purposes. Perceptually-related F0 parameters are proposed with the aim of automatically classifying phrase final tones. Analyses are conducted to verify how consistently subjects are able to categorize phrase final tones, and how perceptual features are related...