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Related Experiment Video

Updated: Sep 10, 2025

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Visual sensitivity to irregularities in periodic tiling patterns.

J Farley Norman¹, Yulia Mishchuk², Maria Carmichael²

¹Department of Psychological Sciences, Western Kentucky University, Bowling Green, Kentucky, 42101-2030, USA. farley.norman@wku.edu.

Scientific Reports

|August 19, 2025

Summary

This summary is machine-generated.

Human vision is moderately sensitive to disruptions in repeating visual patterns. High sensitivity for detecting pattern irregularities occurs only when elements repeat at smaller spatial scales.

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Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Area of Science:

Visual perception
Psychophysics
Geometry

Background:

Regular patterns tiling the plane have been studied by mathematicians for centuries.
Such patterns are found in traditional art and are fundamental to visual processing.

Purpose of the Study:

To quantify human visual sensitivity to disruptions in the periodicity of regular, plane-tiling patterns.
To investigate how pattern density and alteration magnitude affect the detection of irregularities.

Main Methods:

Signal detection methodology was employed.
Observers identified whether presented patterns were perfectly regular or contained broken periodicity.
Stimuli consisted of obliquely oriented line segments with manipulated density and alteration magnitude.

Main Results:

Human observers demonstrated moderate sensitivity (d'=1.76) in detecting periodicity violations.
High detection performance (d'>2.0) was achieved exclusively when pattern elements repeated over small spatial scales.

Conclusions:

Visual perception is moderately adept at identifying deviations from regularity in tiled patterns.
Spatial scale is a critical factor influencing the accuracy of detecting pattern irregularities.