Table 2.
Summary of all spellers discussed in this review which are based on the P300 Matrix Speller.
| Topic/Speller Name | Reference | Subjects | Mean ITR/Typing Speed | Mean Accuracy | |
|---|---|---|---|---|---|
| Matrix Speller | [7] | Farwell and Donchin 1988 | 4 healthy | 12 bits/min | 95.0% |
| Stimuli Variations | [43] | Yeom et al. 2014a | 4 healthy | 66.3 bits/min | 64.7% |
| [44] | Obeidat et al. 2015 | 14 healthy | 13.7 bits/min | 93.3% | |
| [45] | Liu et al. 2010 | 4 healthy | rotation stimuli: 35.8 bits/min | rotation stimuli: 89.06% | |
| [46] | Shi et al. 2012 | 7 healthy | SBP433: 26.8 bits/min | 99.7% | |
| [47] | Eom et al. 2013 | 5 healthy | 13.5 s/char | 79.2% | |
| [48] | Jin et al. 2010 | 8 healthy | 14.8 bits/min | 92.9% | |
| [49] | Polprasert et al. 2013 | 10 healthy | 23.82 bits/min | 84.0% | |
| Familiar Faces and symbols | [50] | Kaufmann et al. 2011 | 20 healthy | N/A | Max 100% |
| [51] | Li et al. 2015a | 17 healthy | N/A | N/A | |
| [52] | Li et al. 2015b | 12 healthy | 39.0 bits/min | 86.1% | |
| [53] | Kaufmann and Kübler 2014 | 8 healthy | ~80 bits/min | 81.25% | |
| [54] | Yeom et al. 2014b | 15 healthy | RASP-F: 53.7 bits/min RASP: 32.8 bits/min |
84.0% 90.7% |
|
| [56] | Kathner et al. 2015 | 18 healthy + 1 LIS | 15.5–16.2 bits/min | 94–96% | |
| Variation of letters arrangement | [57] | Ahi et al. 2011 | 14 healthy | 55.32 bits/min | 87.14% |
| [58] | Li et al. 2011 | 10 healthy + 10 NMD | N/A | 79.7–28.7% | |
| [59] | Jin et al. 2012 | 9 healthy | 18-P: 29.9 bits/min 21-P: 27.1 bits/min |
18-P: 93.3% 21-P: 94.8% |
|
| [60] | Sakai and Yagi 2011 | 9 healthy | N/A | N/A | |
| Matrix Speller with Prediction | [62] | Ryan et al. 2011 | 24 healthy | 17.71 bits/min | 84.88% |
| [63] | Kaufmann et al. 2012 | 20 healthy | Max 25 bits/min | >70% | |
| [64] | Akram et al. 2013 | 4 healthy | 26.1 s/char | 77.5% | |
| [65] | Akram et al. 2014 | 10 healthy | 26.13 s/char | 77.14% | |
| Other languages | [66] | Minett et al. 2010 | 30 healthy | 14.5 bits/min | >60% |
| [67] | Minett et al. 2012 | 24 healthy | 4.23 bits/min | 82.8% | |
| [68] | Yu et al. 2016 | 10 healthy | 39.2 bits/min | 92.6% | |
| [69] | Kabbara et al. 2015 | 11 healthy | N/A | 88–95% | |
| [70] | Lee et al. 2011 | 3 healthy | N/A | 100% after training | |
| [71] | Yamamoto et al. 2014 | 4 healthy | N/A | 93% | |
| [72] | Ikegami et al. 2014 | 7 ALS patients + 7 healthy | N/A | ALS: 24%, 55% healthy: 55%, 83% |
|
| 3D Blocks Matrix Speller | [73] | Noorzadeh et al. 2014 | 16 healthy | N/A | ~90% with 5 repetitions |