Tracking behavioral and neural fluctuations during sustained attention: A robust replication and extension

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• Concerns exist regarding neuroimaging study replicability due to small sample sizes.
• The gradual-onset continuous performance task (gradCPT) shows promise for measuring sustained attention but requires neuroimaging validation in large cohorts.

Purpose of the Study:

• To replicate and extend prior neuroimaging findings using the gradCPT in a large sample of 140 Veterans.
• To investigate the neural basis of sustained attention ability and attentional fluctuations.
• To explore the relationship between brain activity dynamics and individual differences in attention.

Main Methods:

• Utilized the gradual-onset continuous performance task (gradCPT) with 140 Veteran participants.
• Employed functional magnetic resonance imaging (fMRI) to measure brain activity (BOLD signals).
• Analyzed the temporal dynamics of brain networks, including task-positive and task-negative networks.

Main Results:

• Replicated findings that Blood-Oxygen-Level-Dependent (BOLD) activity in attention networks and the default network tracks attentional stability.
• Demonstrated that the coupling between attentional stability and ongoing brain activity predicts individual differences in sustained attention.
• Showed that temporal dynamics across the default and dorsal attention networks are associated with subsequent trial lapse likelihood.

Conclusions:

• The gradCPT is a reliable paradigm for studying sustained attention and its neural underpinnings.
• Brain activity dynamics, particularly network coupling, are crucial for understanding individual variations in attention.
• This research highlights the gradCPT's utility in investigating attentional fluctuations and deficits.