In the article “Temporal Signatures of Criticality in Human Cortical Excitability as Probed by Early Somatosensory Responses,” by Tilman Stephani, Gunnar Waterstraat, Stefan Haufe, Gabriel Curio, Arno Villringer, and Vadim V. Nikulin, which appeared on pages 6572–6583 of the August 19, 2020 issue, the value of the stimulus duration was published incorrectly: 20 µs should instead be 200 µs. In the Material and Methods subsection Stimuli, the third sentence should read: “The electrical stimuli were designed as squared pulses of a 200 µs duration.” This does not affect the conclusion of the article. The online version has been corrected.