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Related Experiment Video

Updated: Aug 3, 2025

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

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Published on: April 11, 2025

Response assignment influences visual recognition.

Mengxue Kang¹, Madison Norman¹, Alexa Becker¹

¹Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ, 08854, USA.

Attention, Perception & Psychophysics

|April 10, 2023

Summary

This summary is machine-generated.

This study reveals two distinct brain systems for visual recognition tasks. Task performance and brain activity differ based on whether the "same" or "different" response is assigned to the right key.

Keywords:

Eye Movements Mechanisms Neural mechanisms Response time models

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Area of Science:

Cognitive Neuroscience
Neuroimaging
Psychology

Background:

Immediate visual recognition tasks, like the same/different task, are crucial for understanding memory and decision-making.
Previous research suggests distinct neural pathways may underlie different cognitive processes.

Purpose of the Study:

To investigate if two different neural systems influence performance in a visual same/different recognition task.
To determine how response key assignment affects task strategy and brain activation.

Main Methods:

Participants performed a visual same/different task, responding to the presence of a target consonant in a study string.
Response times (RT) were recorded, and functional magnetic resonance imaging (fMRI) was used to measure brain activity.
The 'same' and 'different' responses were assigned to the right response key in separate conditions.

Main Results:

When 'same' response was on the right, no positional effect on RT was observed, suggesting no comparison with the study string.
When 'different' response was on the right, RT showed a positional effect, indicating study string comparison.
fMRI showed differential activation in the caudate and hippocampus based on the response key assignment.

Conclusions:

Two distinct neural systems and computational processes are engaged depending on the response key assignment in a visual recognition task.
The caudate and left hippocampus are implicated when the 'different' response is on the right.
The right hippocampus is more active when the 'same' response is on the right, indicating distinct neural specializations.