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Perceptual foundation and extension to phase tagging for rapid invisible frequency tagging (RIFT)

  • 0Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Nijmegen, The Netherlands.
Imaging Neuroscience (cambridge, Mass.) +

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August 13, 2025

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August 13, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Rapid Invisible Frequency Tagging (RIFT) is a new brain imaging technique. Studies confirm RIFT is undetectable and works best with full-amplitude contrast, enabling new research in visual neuroscience.

Area Of Science

  • Cognitive Neuroscience
  • Visual Neuroscience
  • Neuroimaging

Background

  • Rapid Invisible Frequency Tagging (RIFT) is an emerging visual stimulation protocol.
  • RIFT uses rapidly oscillating luminance to evoke strong, measurable neural responses.
  • Its high signal-to-noise ratio and perceived invisibility make it promising for studying visual processing.

Purpose Of The Study

  • To provide robust evidence for the subjective undetectability of RIFT.
  • To determine optimal parameters for RIFT, specifically luminance or contrast manipulation.
  • To explore novel applications of RIFT beyond standard frequency tagging.

Main Methods

  • Subjective detection tests to confirm RIFT invisibility.
  • Comparative analysis of full-amplitude vs. reduced-amplitude luminance/contrast modulation.
  • Investigation of phase tagging as an alternative to frequency tagging in RIFT.

Main Results

  • RIFT stimuli were confirmed to be subjectively undetectable.
  • Full-amplitude luminance or contrast manipulations yielded the best tagging results.
  • Phase tagging was demonstrated as a reliable method for RIFT studies.

Conclusions

  • RIFT is a robust and subjectively invisible technique for visual neuroscience.
  • Optimized RIFT protocols enhance signal quality and experimental design.
  • The introduction of phase tagging expands the utility of RIFT for neural basis research.

Keywords:

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