TLDR Pick a pitch and see how many 2 octave arpeggios you can play, starting and ending on that pitch, including inversions of chords that do not have that pitch as the root.
I don't know that " lateral Indexing" is a common name for this practice -first time I have heard it, but it seems like a potentially fruitful approach to practice.
I don't know that " lateral Indexing" is a common name for this practice -first time I have heard it, but it seems like a potentially fruitful approach to practice.