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Related Experiment Video

Updated: Jun 28, 2026

Transient Optical Clearing Using Absorbing Molecules for Ex Vivo and In Vivo Imaging

Transient Optical Clearing Using Absorbing Molecules for Ex Vivo and In Vivo Imaging

Published on: July 11, 2025

At first glance, transparency enhances assimilation.

Arno Koning¹, Charles M M de Weert, Rob van Lier

¹Nijmegen Institute for Cognition and Information, Radboud University Nijmegen, PO Box 9104, 6500 HE Nijmegen, The Netherlands. a.koning@nici.ru.nl

|November 7, 2008

Summary

This summary is machine-generated.

Perceptual grouping, not transparency, drives perceived lightness assimilation in unambiguous displays without specific attention. Short presentation times with transparency also induced assimilation, suggesting complex interactions.

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Visualizing Visual Adaptation

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Transient Optical Clearing Using Absorbing Molecules for Ex Vivo and In Vivo Imaging

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Published on: July 11, 2025

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

Area of Science:

Visual perception
Cognitive psychology

Background:

Transparency and perceptual grouping can cause assimilation effects, but typically require ambiguous displays and specific attentional instructions.
Previous research indicates these effects are context-dependent, influencing how visual information is integrated.

Purpose of the Study:

To investigate the influence of transparency, perceptual grouping, and presentation time on perceived lightness.
To determine conditions under which assimilation occurs in unambiguous displays without explicit attentional guidance.

Main Methods:

Participants judged the relative darkness of two simultaneously presented E-shaped objects.
Stimuli featured partly overlapping transparent E-shapes, with presentation times and junction visibility manipulated.
Transparency interpretation possibility and perceptual grouping were systematically varied.

Main Results:

Assimilation was absent in unambiguous displays with unrestrained presentation times when transparency interpretation was possible.
Inhibiting transparency interpretation by occluding junctions led to assimilation.
Assimilation was observed with short presentation times, even when transparency interpretation was possible.

Conclusions:

Perceptual grouping is crucial for assimilation in unambiguous displays without specific attentional instructions.
Transparency's role in assimilation is complex and moderated by display ambiguity and presentation duration.
Short presentation times may facilitate assimilation by limiting deep processing of transparency cues.