Figure 1.
In each trial, a moving object changed its position and color at a moment proximate to the button-press response of a participant. Participants performed two types of judgment (agency-judgment and color-judgment) in a pseudo-random order. The agency-judgment condition required participants to report whether they felt they caused the change of a visual stimulus, while the color-judgment condition asked participants whether the color of the stimulus changed from gray to red. The timing of the stimulus change in the agency-judgment task and the color of the stimulus in the color-judgment task were adjusted on a trial-to-trial basis for each task. See the main text for details.
Table 1.
Behavioral measures for each task condition.
Figure 2.
Regions associated with a between-condition difference.
Left: A contrast of agency vs. color condition revealed a distributed neural network including the bilateral insula/operculum, IPL/TPJ, SMA/ACC, and right DLPFC. Right: A color vs. agency condition contrast revealed activity mainly among visual areas (p<0.001 uncorrected, with an extent threshold of 2 voxels).
Table 2.
Regions showing differential activity between task conditions (agency-judgment condition vs. color-judgment condition).
Table 3.
Regions showing differential activity between conditions for each type of judgment (“yes”/“no”).
Figure 3.
Activation for “Yes” versus “No” judgment in each condition.
Left panels: A contrast of “yes” vs. “no” judgments for the agency-judgment condition revealed activity in posterior medial regions. Right panels: The same contrast as for the color-judgment condition revealed activation in the anterior part of the brain (p<0.001 uncorrected, with an extent threshold of 2 voxels).
Table 4.
Regions showing differential activity between “yes” and “no” judgment for each condition.