during a long experiment, there can be different sources of variability. for example, the participant can get sleepy, which influences measures like reaction times on a slower timescale. these slow drifts can then mask differences between experimental conditions. pic.twitter.com/kGiK78Yf02
— Natalie Schaworonkow (@nschawor) June 9, 2021
ok, imagine you have an oscillation that is not symmetric around 0 (small direct current shift) with some amplitude modulation, for instance with 1/f-dynamics. ➡️ then these 1/f-dynamics will show up in low frequency part of spectrum (red); in addition to around oscillation peak (yellow).
— Natalie Schaworonkow (@nschawor.bsky.social) October 16, 2025 at 3:58 PM
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3D printed brain, some LEDs inside, hand for scale.
