Three scenarios of changes in the “good” and “bad” components of variance (VUCM and VORT) with practice. In all three cases, VORT is expected to drop. VUCM may drop less (or be unchanged or even increase) as compared to VORT (the synergy becomes stronger – scenario #1, S1), VUCM may drop proportionally to VORT (no change in the synergy strength – scenario #2, S2), or it may drop more than VORT (the synergy weakens – scenario #3, S3).