Linear model fits to SSVEP time courses. A, Model coefficients for electrode Oz, for SSVEP amplitudes at the dominant stimulus frequency (purple) and the suppressed stimuli frequency (green). Colored dots plot individual participant coefficients. Black symbols plot across participant means and SEMs. To aid interpretation, the intercept β₀ is not shown; instead, we show the average amplitude <mml:math display="inline"><mml:mover accent="true"><mml:mrow><mml:mi>A</mml:mi></mml:mrow><mml:mo>¯</mml:mo></mml:mover></mml:math>A¯. B, β₁ and β₃ for Oz as in A, with different excluded duration lengths from 0 ms (whole time course included) to 1000 ms (i.e., the final second of the time course was excluded from analysis). Data were excluded to avoid effects of the transition at the end of the period, and the model fits in A excluded 500 ms. Little effect of excluded duration was observed: All β₁ and β₃ values were significant regardless of the amount of the time course that was excluded (all p < 0.05). Error bars represent standard error. C, Distribution of statistical reliability (t score) of β₁ and β₃, across electrodes. Electrodes shown in green indicate where the coefficients are significantly different from 0 [t test, p < 0.05, Bonferroni-corrected, n = 136 (34 electrodes × 4 parameters)].