In this study, patients who did not see improvements in their symptoms showed shorter act-apart coordination and more act-on-each-other coordination. Compared to the therapists, patients displayed less synchronization in their movements and were more likely to display act-on-each-other coordination. During early therapeutic sessions, act-on-each-other coordination and short act-apart coordination were significantly associated with non-improvement. Additionally, patients who displayed less synchronization and more hand coordination with increased somatosensory stimulation struggled to regulate themselves. …