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Area of Science:

  • Neuroscience
  • Psychology

Background:

  • Flicker light stimulation can induce transient alterations in consciousness, including visual hallucinations.
  • Quantifying these subjective experiences is crucial for comparing different methods of inducing altered states and studying their neural basis.

Purpose of the Study:

  • To systematically assess subjective experiences during 3 Hz and 10 Hz stroboscopic light stimulation.
  • To investigate the influence of personality traits on these induced altered states of consciousness.

Main Methods:

  • A within-subjects design with 24 participants.
  • Utilized mood state, time perception, Altered State of Consciousness Rating Scale, and Phenomenology of Consciousness Inventory.
  • Assessed personality traits using NEO Five-Factor Inventory-2 and Tellegen Absorption Scale.

Main Results:

  • Flicker light stimulation induced vivid visual hallucinations, with stronger effects observed at 10 Hz.
  • Higher scores on the Tellegen Absorption Scale correlated significantly with greater experienced alterations in consciousness.
  • The intensity of flicker-induced effects was comparable to those reported for psychedelic substances.

Conclusions:

  • Flicker light stimulation is an effective method for inducing visual effects and altered states of consciousness.
  • Personality traits, particularly absorption, play a role in modulating subjective experiences during flicker stimulation.
  • This research supports flicker stimulation as a tool for investigating shared neuronal mechanisms with psychedelic-induced states.