Figure 2. Example Harmony stimulus in all three congruity conditions.

Trigger i marks the onset of the harmonic incongruity (or matched congruity) and trigger r marks the onset of the harmonic resolution (or lack of). Two quavers are kept identical either side of the chords of interest. In the example here, the incongruous conditions start in the key of F major and the harmonic incongruity is a chord of F7 (borrowed from the key of B flat major). The incongruous-resolved condition resolves harmonically when it returns to the original key of F major (trigger r) whereas the incongruous-unresolved condition, the equivalent chord continues in the adopted key of B flat major. In the congruous condition, the entire sequence is in the key of B flat major.