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Related Experiment Video

Updated: Mar 11, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Modulation of microsaccades by spatial frequency during object categorization.

Matt Craddock¹, Frank Oppermann², Matthias M Müller³

¹Institute of Psychology, University of Leipzig, Germany; School of Psychology, University of Leeds, UK.

Vision Research

|November 24, 2016

Summary

This summary is machine-generated.

Larger microsaccades help identify objects by processing high spatial frequency details. Smaller microsaccades showed no change during object categorization tasks.

Keywords:

Eye movements Microsaccades Object categorisation Object identification Spatial frequency

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Area of Science:

Visual perception and cognitive neuroscience
Ocular motor control and spatial vision

Background:

Object recognition involves coarse-to-fine visual processing based on spatial frequency.
Microsaccades, frequent during object categorization, may aid in resolving high spatial frequency information.

Purpose of the Study:

To investigate the role of microsaccades in object categorization by analyzing their rate, amplitude, and speed.
To determine if microsaccades are modulated by object presence (high-level feature) and spatial frequency content (low-level characteristic).

Main Methods:

Participants performed an object categorization task viewing natural objects, man-made objects, or non-objects.
Images were presented unfiltered (broadband; BB), low spatial frequency (LSF), or high spatial frequency (HSF).
Microsaccade characteristics (rate, amplitude, speed) were analyzed in relation to image type and spatial frequency.

Main Results:

Microsaccades exhibited a bimodal amplitude distribution, splitting at 0.4° visual angle.
Larger microsaccades (≥0.4°) were more frequent for objects than non-objects.
Larger microsaccades were more frequent for HSF and BB objects compared to LSF objects; smaller microsaccades showed no significant modulation.

Conclusions:

Larger microsaccades appear to play a role in resolving high spatial frequency information crucial for object identification.
The findings support the hypothesis that specific microsaccade characteristics are utilized for detailed visual processing during object recognition.