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Updated: Jan 26, 2026
A Dual Task Procedure Combined with Rapid Serial Visual Presentation to Test Attentional Blink for Nontargets
Published on: December 5, 2014
The Attentional Blink is Related to the Microsaccade Rate Signature
Mark J Roberts1, Gesa Lange1, Tracey Van Der Veen1
1Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
Abstract:
The reduced detectability of a target T2 following discrimination of a preceding target T1 in the attentional blink (AB) paradigm is classically interpreted as a consequence of reduced attention to T2 due to attentional allocation to T1. Here, we investigated whether AB was related to changes in microsaccade rate (MSR). We found a pronounced MSR signature following T1 onset, characterized by MSR suppression from 200 to 328 ms and enhancement from 380 to 568 ms. Across participants, the magnitude of the MSR suppression correlated with the AB effect such that low T2 detectability corresponded to reduced MSR. However, in the same task, T1 error trials coincided with the presence of microsaccades. We discuss this apparent paradox in terms of known neurophysiological correlates of MS whereby cortical excitability is suppressed both during the microsaccade and MSR suppression, in accordance to poor T1 performance with microsaccade occurrence and poor T2 performance with microsaccade absence. Our data suggest a novel low-level mechanism contributing to AB characterized by reduced MSR, thought to cause suppressed visual cortex excitability. This opens the question of whether attention mediates T2 performance suppression independently from MSR, and if not, how attention interacts with MSR to produce the T2 performance suppression.
Insights
The attentional blink (AB) effect, where detecting a second target is impaired after a first, may be linked to changes in microsaccade rate (MSR). Reduced MSR after the first target correlates with impaired second target detection.
Area of Science:
- Cognitive Neuroscience
- Visual Perception
- Oculomotor Behavior
Background:
- The attentional blink (AB) is a phenomenon where detecting a second target (T2) is impaired after a first target (T1).
- Current theories attribute AB to attentional resource allocation to T1, reducing attention available for T2.
- The role of low-level visual processing mechanisms, such as eye movements, in AB remains less understood.
Purpose of the Study:
- To investigate the relationship between microsaccade rate (MSR) and the attentional blink (AB) phenomenon.
- To explore whether changes in MSR contribute to the reduced detectability of T2 in the AB paradigm.
- To examine the neurophysiological correlates of MSR changes and their potential impact on visual cortex excitability.
Main Methods:
- Participants performed a task involving the rapid serial visual presentation of targets (T1 and T2) to elicit the AB effect.
- Microsaccade rate (MSR) was monitored throughout the task using eye-tracking.
- Correlational analyses were performed between MSR patterns and T2 detectability, as well as T1 performance.
Main Results:
- A distinct MSR signature was observed following T1 onset, including suppression (200–328 ms) and enhancement (380–568 ms).
- The magnitude of MSR suppression correlated with the AB effect; greater suppression corresponded to lower T2 detectability.
- Microsaccade occurrence was associated with T1 errors, while T2 performance deficits were linked to MSR absence.
Conclusions:
- Reduced MSR, potentially leading to suppressed visual cortex excitability, may represent a novel low-level mechanism contributing to the attentional blink.
- The findings suggest a complex interplay between microsaccade activity, cortical excitability, and attentional processes in modulating visual target detection.
- Further research is needed to disentangle the independent contributions of attention and MSR to T2 performance suppression in the AB paradigm.
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