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Related Experiment Video

Updated: Feb 5, 2026

Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills

Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills

Published on: January 19, 2024

Visual percepts modify iconic memory in humans.

Yoichi Sugita¹, Souta Hidaka², Wataru Teramoto³

¹Department of Psychology, Waseda University, 1-24-1 Toyama, Shinjuku, Tokyo, 162-8644, Japan. y.sugita@waseda.jp.

Scientific Reports

|September 8, 2018

Summary

Iconic memory, the brief visual trace, updates based on new visual input. This research reveals how iconic memory contents are modulated by subsequent stimuli before conscious perception.

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Area of Science:

Visual perception
Cognitive neuroscience
Psychophysics

Background:

Iconic memory briefly retains visual stimuli.
Temporal integration of iconic memory with new inputs is debated.
The Poggendorff illusion demonstrates visual misperception.

Purpose of the Study:

To investigate the temporal integration of iconic memory with subsequent visual inputs.
To determine how iconic memory contents are revised by new stimuli.
To explore the role of iconic memory in visual illusions.

Main Methods:

Presented the Poggendorff illusion using line segments and an intervening rectangle.
Varied the temporal presentation interval between stimuli (50 ms before to 200 ms after).
Tested the illusion with static and moving objects.

Main Results:

The Poggendorff illusion was observed when the rectangle appeared 50 ms before to 200 ms after the line segments.
The illusion was strongest with a 100-150 ms delay between stimuli.
Illusion occurred with moving objects only when line segments preceded the rectangle.

Conclusions:

Iconic memory contents are dynamically revised by subsequent visual input.
This revision influences conscious perception in a time-locked manner.
Iconic memory operates in both retinotopic and object-centered frames of reference.