a trend toward significancep = .017
Analysis revealed that mean MPT increased significantly between session 6 and session 11 (p = .003) with this increase maintained through session 15 and the three follow-up sessions; mean highest attainable pitch increased significantly between treatment sessions 6 and 11 (p = .004), and demonstrated a trend toward significance between sessions 6 and 15 (p = .017) with the increase maintained through the one-week and one-month follow-up sessions, but not at six months post treatment.