Do People with ALS Perform Better with the Checkerboard Paradigm than with the Standard Row/Column P300-BCI?
Brain-computer interfaces (BCIs) provide communication that does not depend on neuromuscular activity. Several studies have demonstrated that those with advanced ALS can use noninvasive BCIs (e.g.,1,2,3). In able-bodied users, Townsend et al2 showed that a pseudorandom -or checkerboard paradigm (CBP) significantly improves P300-BCI performance compared to the standard or row/column paradigm (RCP). The CBP flashes stimuli in quasi-random groups that do not contain adjacent items, and it ensures at least six flashes between flashes of a given item. The combination of these two factors improves accuracy and bitrate. Townsend et al  also reported anecdotal improvements with the CBP in people with ALS who had extensive experience with the RCP. The present study seeks to verify these results in a larger group of people with ALS.
Feldman, Sara; Petaccio, Vincent; Sellers, Eric W.; Townsend, George; Vaughan, Theresa M.; Hauser, Christopher; Harriman-Patterson, Terry; and Wolpaw, Jonathan R., "Do People with ALS Perform Better with the Checkerboard Paradigm than with the Standard Row/Column P300-BCI?" (2010). ETSU Faculty Works. 934.