The left panel of the figure displays startle response magnitude separately for CUE− and CUE+ stimuli in the threat focus/low-load (TF/LL), alternative focus/low-load (AF/LL), and alternative focus/high-load (AF/HL) conditions.
The right part of the figure displays fear-potentiated startle in these same three conditions. Fear-poteniated startle is calculated as the difference between startle responses for CUE+ vs. CUE−.