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Individual differences in long-range time representation.

Camila S Agostino1, Marcelo S Caetano2, Fuat Balci3

  • 1Federal University of ABC, São Bernardo do Campo, Brazil. camila.agostino@ufabc.edu.br.

Attention, Perception & Psychophysics
|January 29, 2017
PubMed
Summary
This summary is machine-generated.

Humans perceive long-range time linearly on average, challenging the compressed time hypothesis. Individual differences in subjective time scales exist, impacting intertemporal choices.

Keywords:
Line paradigmPsychophysicsTime discountingTime representation

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Area of Science:

  • Cognitive Psychology
  • Decision Science
  • Behavioral Economics

Background:

  • Previous research proposed a compressed power function for long-range time representation.
  • This compression was hypothesized to explain time inconsistency in financial discount rate preferences.
  • The accuracy of linear versus power function models for empirical data was unexplored.

Purpose of the Study:

  • To evaluate the explanatory power of linear and power function models for empirical data.
  • To assess how well these models fit individual participant data across different procedural settings.
  • To investigate the average and individual psychophysical functions of long-range time representation.

Main Methods:

  • Utilized a line paradigm across five procedural variations with 35 adult participants.
  • Analyzed aggregated data to compare linear regression and power model fits.
  • Conducted an individual-participant-based analysis to determine the best-fitting model for each subject.

Main Results:

  • Aggregated data showed linear functions explained over 98% of the variance, outperforming power models.
  • Individual analysis revealed linear models fit best for 14 participants, power models for 21.
  • The null hypothesis (β=1) was rejected for 20 participants, with individual β values normally distributed.

Conclusions:

  • On average, humans perceive long-range time linearly, not in a highly compressed manner.
  • Significant individual differences exist in subjective time scales.
  • Attributing intertemporal choice deviations solely to compressed subjective time requires individual-level analysis.