Performance of the six subject pairs for the implemented brain-to-brain interface (BBI).

<p>The ROC curves from the six subject pairs were shown in terms of EEG-based BCI task (left column), FUS-mediated CBI task (middle column), and overall BBI communication (right column). The rows indicate three multiple sessions (rows: session #1 to #3). Each BCI/CBI subject or BBI pair was labeled 1–6 around the data point circles.