Color coded group statistical maps of BOLD signal increase for task versus baseline. In this map, for each significantly activated (p < 0.001, corrected) voxel, the relative contribution (RC) of each condition is visualized with a red-yellow-green pseudo-color scale. An RC value of 1 (red) indicates that a voxel is solely responding during the condition in which subjects imagined hearing spoken words and made a metrical stress decision, whereas an RC value of -1 (green) indicates that a voxel is solely responding during the condition in which subjects actually heard the words (presented by earphones) and made the metrical stress decision. An RC value of 0 (yellow) indicates that a voxel is responding during both the conditions. The maps are superimposed on a Talairach-normalized unfolded brain. Above: unfolded left hemisphere (frontal cortex at the left and occipital cortex at the right); below: unfolded right hemisphere (frontal cortex at the right and occipital cortex at the left). See Aleman et al., pp. 221-229.
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