Eyes on the past: Gaze stability differs between temporal expectation and temporal attention

Area of Science:

• Cognitive Neuroscience
• Oculomotor Research

Background:

• Temporal expectation and temporal attention are distinct processes influencing behavior and neural activity.
• The preceding foreperiod (interval before a stimulus) affects behavioral and oculomotor expectation.
• Understanding the interaction between foreperiod, temporal attention, and expectation is crucial for explaining attentional deployment.

Purpose of the Study:

• To investigate if the preceding foreperiod modulates temporal attention effects.
• To examine the interaction between temporal attention and expectation.
• To determine how foreperiod timing influences attentional deployment and oculomotor behavior.

Main Methods:

• Participants performed tasks involving visual stimuli with varying preceding foreperiods.
• Oculomotor behavior, specifically microsaccade timing and rates, was recorded.
• Performance metrics and gaze stability were analyzed in relation to foreperiod conditions and attentional demands.

Main Results:

• Temporal attention consistently improved performance and gaze stability by altering microsaccade timing across all foreperiod conditions.
• Microsaccade rates were inhibited by attention only during expected preceding foreperiods.
• Late preceding foreperiods weakened expectation effects on microsaccade rates, but attention effects persisted.

Conclusions:

• Oculomotor system flexibility does not directly equate to enhanced performance.
• Selection history from preceding events can inform expectation but does not solely determine, strengthen, or guide subsequent attentional deployment.
• Temporal attention exerts a consistent influence on oculomotor timing, independent of prior expectation, but its modulatory effects on microsaccade rates are context-dependent.