Variable precision in visual perception.

The Precision of "Haptic" Rod Length Perception Is Reduced by Lack of Visual Precision

In studies on haptic rod length perception, participants conventionally report their length estimates by placing a visual landmark at a position equal to the rod’s perceived endpoint. We hypothesized that this visual aspect substantially increases the variability of the recorded length judgments. To examine this, we developed a virtual reality length judgment apparatus that provides better visu...

Variable Precision Rough Set Model

A general ized model of rough sets called variable precision model (VP-model), a imed at modell ing classification problems involving uncertain or imprecise information, is presented. The general ized model inherits all basic mathematical propert ies of the original model introduced by Pawlak. The main concepts are introduced formally and illustrated with simple examples. The application of the...

Variable-precision, interval arithmetic coprocessors

This chapter presents the design and analysis of variable-precision, interval arithmetic processors. The processors give the user the ability to specify the precision of the computation, determine the accuracy of the results, and recompute inaccurate results with higher precision. The processors support a wide variety of arithmetic operations on variable-precision oating point numbers and inter...

Dynamic causal modelling of precision and synaptic gain in visual perception — an EEG study

Estimating the precision or uncertainty associated with sensory signals is an important part of perception. Based on a previous computational model, we tested the hypothesis that increasing visual contrast increased the precision encoded in early visual areas by the gain or excitability of superficial pyramidal cells. This hypothesis was investigated using electroencephalography and dynamic cau...

Visual perception in a