SSVEP responses to stimuli of different sizes; organization of the plot as in <b>Figure 2</b>.

<p>SSVEP responses to stimuli of different sizes; organization of the plot as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112099#pone-0112099-g002" target="_blank"><b>Figure 2</b></a>.</p

SSVEP responses to stimuli of different colours; organization of the plot as in <b>Figure 2</b>.

<p>SSVEP responses to stimuli of different colours; organization of the plot as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112099#pone-0112099-g002" target="_blank"><b>Figure 2</b></a>.</p

SSVEP responses to stimuli with and without fixation point; organization of the plot as in <b>Figure 2</b>.

<p>SSVEP responses to stimuli with and without fixation point; organization of the plot as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112099#pone-0112099-g002" target="_blank"><b>Figure 2</b></a>.</p

SSVEP responses to circle and square stimuli; organization of the plot as in <b>Figure 2</b>.

<p>SSVEP responses to circle and square stimuli; organization of the plot as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112099#pone-0112099-g002" target="_blank"><b>Figure 2</b></a>.</p

SSVEP responses to circle and square stimuli; organization of the plot as in <b>Figure 2</b>.

<p>SSVEP responses to circle and square stimuli; organization of the plot as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0112099#pone-0112099-g002" target="_blank"><b>Figure 2</b></a>.</p

The results of post-hoc Wilcoxon signed-rank for comparison of SSVEP magnitude pairs evoked by different coloured stimuli in experiment I.

<p>The results of post-hoc Wilcoxon signed-rank for comparison of SSVEP magnitude pairs evoked by different coloured stimuli in experiment I.</p

Parameters of the stimulus used in Experiment I.

<p>Parameters of the stimulus used in Experiment I.</p

Relative power increase for SSVEP response to different colours of stimuli.

<p>Mean computed for all the subjects. Error bars indicate standard error of the mean (SEM). Horizontal lines above the bars indicate statistically significant differences on the level of p<0.001 (***), p<0.01 (**), and p<0.05 (*).</p