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Related Experiment Video

Updated: Jun 1, 2026

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Published on: October 27, 2016

Perceptual scale expansion: an efficient angular coding strategy for locomotor space.

Frank H Durgin¹, Zhi Li

¹Swarthmore College, 500 College Avenue, Swarthmore, PA 19081, USA. fdurgin1@swarthmore.edu

Attention, Perception & Psychophysics

|May 20, 2011

Summary

Human perception of gaze declination and surface orientation is distorted. A linear expansion of the angular range near horizontal enhances coding efficiency for precise motor control.

Related Experiment Videos

Last Updated: Jun 1, 2026

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Published on: October 27, 2016

Area of Science:

Visual perception
Motor control
Sensory coding

Background:

Most sensory information is processed logarithmically.
Precise motor control relies on accurate coding of angular variables.

Purpose of the Study:

To investigate the coding scale for perceived gaze declination.
To determine if this coding is distorted and its functional implications.

Main Methods:

Four experiments were conducted using explicit and implicit measures.
Perceived gaze declination and optical slants were assessed.

Main Results:

Perceived gaze declination and optical slants are coded on a distorted scale.
A linear expansion (approx. 1.5x) occurs for angular ranges near horizontal.
This distortion is evident in explicit and implicit measures.

Conclusions:

The observed scale expansion enhances coding efficiency for angular perceptual variables.
Dual distortions in gaze declination and optical slant perception explain distance misperceptions.
Accurate spatial action may result from perceptual calibration.