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Does psychophysiological predictive anticipatory activity predict real or future probable events?

Patrizio E Tressoldi1, Massimiliano Martinelli1, Luca Semenzato1

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Summary

Human physiology can predict future events, regardless of whether they actually occur. This predictive anticipatory activity (PAA) was observed in experiments using heart rate and pupil dilation.

Keywords:
Random eventsanticipationheart ratepredictionpupil dilation

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Area of Science:

  • Psychophysiology
  • Parapsychology
  • Human consciousness studies

Background:

  • Previous research suggests human physiology can predict future events.
  • This phenomenon is termed predictive anticipatory activity (PAA).

Purpose of the Study:

  • To investigate if PAA relates to the probability of future stimuli or their actual occurrence.
  • To differentiate between stimulus probability and stimulus reality in PAA.

Main Methods:

  • Four experiments were conducted.
  • Two experiments measured heart rate.
  • Two experiments measured pupil dilation.

Main Results:

  • All experiments showed predictions 7-10% above chance.
  • Predictions occurred regardless of whether stimuli were neutral or threatening.
  • The presentation or non-presentation of threatening stimuli did not affect prediction accuracy.

Conclusions:

  • Findings suggest PAA is linked to the probability of events, not just their reality.
  • The results are discussed in the context of the 'grandfather paradox'.
  • Potential explanations for PAA are proposed.