Dissociating the sequential dependency of subjective temporal order from subjective simultaneity.

Area of Science:

• Psychology
• Neuroscience
• Perception

Background:

• Perception of simultaneity is subjective and context-dependent.
• Rapid recalibration, where recent stimulus history influences judgments, has been proposed for simultaneity and temporal order tasks.
• The influence of interval history on these tasks requires further investigation.

Purpose of the Study:

• To investigate rapid recalibration in simultaneity judgments (SJ) and temporal order judgments (TOJ).
• To test if centering intervals on perceived simultaneity modulates rapid recalibration.
• To explore the relationship between point of subjective simultaneity (PSS) in SJ and TOJ.

Main Methods:

• Participants completed SJ and TOJ tasks with varying inter-event intervals.
• Rapid recalibration was assessed by analyzing the effect of previous trial intervals on current judgments.
• Interval ranges were centered on objective or subjective simultaneity to test modulation effects.

Main Results:

• A significant rapid recalibration effect was observed in TOJ tasks.
• No significant rapid recalibration effect was found in SJ tasks.
• Centering intervals did not influence the observed recalibration patterns in either task.
• No correlation was found between PSS in TOJ and SJ tasks.

Conclusions:

• Rapid recalibration influences temporal order judgments but not simultaneity judgments.
• The subjective experience of simultaneity may rely on distinct neural mechanisms compared to temporal order perception.
• These findings suggest that SJ and TOJ tasks capture different underlying perceptual processes.