Perception of temporal duration affected by automatic and controlled movements

Area of Science:

• Cognitive Neuroscience
• Psychology of Time Perception

Background:

• Sensorimotor contingency significantly impacts time perception.
• Voluntary actions like saccades and hand movements alter subjective temporal duration.
• Previous research on chronostasis (saccades) found no effect of action initiation context on duration perception.

Purpose of the Study:

• To investigate the effect of action initiation context on duration estimation for finger movements.
• To determine if automatic vs. controlled actions differentially affect perceived time.

Main Methods:

• Participants performed finger movements under automatic, self-timed, and cognitively controlled conditions.
• Duration estimation was measured by reproducing perceived intervals.
• Comparison of reproduced interval lengths across different action initiation contexts.

Main Results:

• Reproduced intervals were significantly shorter for automatically initiated actions compared to self-timed or controlled actions.
• This finding indicates a modulation of subjective time by the manner of action initiation.
• Results support internal clock models with variable switch-closure latencies.

Conclusions:

• The context of action initiation, specifically automaticity, influences subjective duration estimation.
• Findings extend previous chronostasis research to manual actions.
• The internal clock model provides a viable framework for understanding these sensorimotor effects on time perception.