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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Human perception

Background:

  • Number processing is known to influence time perception.
  • The extent to which time perception influences number processing in adults remains unclear.
  • Investigating potential bidirectional interactions between number and time perception is crucial for understanding magnitude representation.

Purpose of the Study:

  • To investigate the bidirectional interactions between number and time perception in human adults.
  • To determine if number influences time processing and vice versa.
  • To explore the influence of task design on the observed interactions.

Main Methods:

  • A novel Stroop-like task was employed.
  • Participants compared numerical magnitudes or temporal durations.
  • Congruent and incongruent conditions were used, with tasks presented in separate or mixed blocks.

Main Results:

  • Number processing influenced time perception from early response times (RTs).
  • Time perception influenced number processing at later RTs.
  • This temporal asymmetry was observed only when tasks were presented in separate blocks.

Conclusions:

  • Bidirectional interactions between number and time perception can be revealed through carefully designed tasks and data analysis.
  • The findings support the hypothesis of shared magnitude or decision mechanisms underlying both number and time processing.
  • Task presentation (separate vs. mixed blocks) significantly affects the observed asymmetry in interactions.