The emphasis of this task is on tonal movement within a chord. Listeners often relate to the top and bottom notes of a chord progression and find it difficult to identify movement within chords. This task aims to measure a participant's ability to identify chords where the top and bottom tones remain constant across the specimens (thereby forcing user's to not rely on any melodic contour changes across specimens).

Test chords are made up of notes from a chromatic scale. The number of notes within the chord is no less than two (but initially no more than four). The internal notes of the specimens are different in all but one of the cases. Some of these notes may be the same as those in the test chord (e.g. all notes of test plus one other, or all but one of the test's notes). The number of specimens increases through the questions, and the number of notes within a chord rises to a possible five.