Figure 2. Two point algorithm.

Each TR, the decision whether a feedback event occurs is made based on the change in signal from the previous time point (t−1) to the current time point (t) in the three ROIs (two targets and one control). Target locations are illustrations, not the targets used in the analysis here. A feedback event occurs if the direction of change in the two targets is the same, and opposite from the direction of change in the control ROI. Figure reproduced with minor changes from (Ramot et al., 2017).