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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: J Cogn Neurosci. 2020 May 19;32(9):1813–1822. doi: 10.1162/jocn_a_01584

Figure 2.

Figure 2.

Baseline noise, characterized using the spectral exponent of pre-trial visual EEG activity, was higher in older adults. (A) Grand-average log-log-space power spectra of younger (blue) and older adults (green) both contralateral (darker) and ipsilateral (lighter) to eventual target presentation. Dotted lines indicate estimated spectral exponents. (B) Contralateral and ipsilateral spectral exponent values of younger (blue) and older (green) adults (participants plotted individually, error bars of standard deviation). Older adults had higher spectral exponent values (main effect of age, *** p < 0.001), suggesting higher levels of pre-trial baseline noise. (C) Grand-average topographies of baseline spectral exponent in younger (left) and older (right) adults.