Feature-based attentional selection affects the perceived duration of a stimulus having two superposed patterns.

Area of Science:

• Visual perception
• Cognitive neuroscience
• Psychophysics

Background:

• Perceived duration of visual events depends on stimulus properties.
• Moving stimuli appear longer than static ones; faster motion intensifies this effect.
• The role of top-down attention in modulating motion-induced time dilation remains unclear.

Purpose of the Study:

• To investigate if feature-based attention can alter time dilation for moving stimuli.
• To determine if attending to a moving pattern influences its perceived duration when coexisting with a static pattern.
• To examine the impact of attentional set on time dilation with varying motion speeds.

Main Methods:

• Experiment 1: Simultaneous presentation of moving and static random-dot patterns; participants attended to one pattern.
• Experiment 2: Presentation of slow and/or fast moving patterns simultaneously; feature-based attentional selection was manipulated.
• Observers' perceived duration of visual events was recorded under different attentional conditions.

Main Results:

• Perceived duration was significantly longer when attention was directed towards the moving pattern compared to the static pattern.
• Feature-based attentional selection modulated the perceived duration of identical physical displays, irrespective of motion speed.
• Attention to a moving stimulus is a critical factor in motion-induced time dilation.

Conclusions:

• Feature-based attention, not just location-based attention, plays a crucial role in motion-induced time dilation.
• Top-down attentional processes can significantly influence the subjective experience of time for visual events.
• Perception of duration is actively constructed and influenced by attentional focus on specific stimulus features.