Frequency encoding/tagging

Definition: An experimental design and data analysis method in which a stimulus is presented at a specific frequency, and the measured brain (or other) responses are assessed for whether they exhibit oscillations / periodic responses at the stimulation frequency stimulus. Multiple stimuli can be studied simultaneously by presenting them at different frequencies. To minimize overlap in the frequency spectrum and avoid inference from systemic variables (e.g., heart rate, respiratory oscillations), prime numbers are often chosen as stimulation frequencies. This design is often used with techniques providing high temporal resolution such as EEG/MEG.

Alternative definition:

Synonym: Frequency tagging

References: https://doi.org/10.1523/JNEUROSCI.16-13-04207.1996

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