“…Invasive BCIs range from 5.4–69 bits/min (Brunner, Ritaccio, Emrich, Bischof, & Schalk, 2011; Guenther & Brumberg, 2011; Hill et al, 2006; Simeral, Kim, Black, Donoghue, & Hochberg, 2011), whereas non-invasive BCIs can range from 1.8–24 bits/min (Nijboer et al, 2008; Sellers, Krusienski, McFarland, Vaughan, & Wolpaw, 2006; Wolpaw et al, 2002). Eye tracking can produce ITRs in the range of 60–222 bits/min (Frey et al, 1990; Higginbotham et al, 2007; Liu et al, 2012; Majaranta et al, 2006, MacKenzie, Aula, & Räihä, 2006), and ITRs produced with head tracking devices range from 78–174 bits/min (Epstein, Missimer, & Betke, 2014; Williams & Kirsch, 2008). Mechanical switches can produce ITRs in the range of 96–198 bits/min.…”