Classification accuracy and bit rate based on offline data.

<p>The two columns from left to right present the classification accuracy and bit rate based on offline data. The four rows from top to bottom present these measures based on data from 0–299 ms, 300–450 ms, 451–700 ms, 701–1000 ms, 0–800 ms and 0–1000 ms after flash onset, respectively.</p

The display during the online runs.

<p>The five-letter target sequence is presented at the top of the screen, and the feedback is presented below it. Please see the text for a description of the different panels in this figure.</p

Grand averaged ERPs.

<p>Grand averaged ERPs across subjects 1–10 over sites F3, Fz, F4, Cz, P7, P8, O1, Oz and O2, LP_ERP is late positive ERP.</p

R-squared values of ERPs.

<p>R-squared values of ERPs from all paradigms at 0-1000ms averaged from subject 1–10 on site F3, Fz, F4, Cz, P7, P3, Pz, P4, P8, O1, Oz, O2.</p

Performance from online feedback runs.

<p>“Flash” is the flash-only paradigm, “Move” is moving-flash paradigm, “N_Face” is neutral face paradigm, “S_Face” is smiling face paradigm, “SN_Face” is neutral shaking face paradigm and “Face_SS” is smiling shaking face paradigm. “Acc” is classification accuracy, “RBR” is raw bit rate and “PBR” is practical bit rate (bits/min). “Avt” is average trials used for average.</p

The percentages of TTIs between sub-trials.

<p>The percentages of TTIs between sub-trials.</p

Mean and range for all dimensions of workload and total score for each application averaged across tasks and end-users.

<p>The possible range of each subscale and the total score is 0 to 100.</p><p>Mean and range for all dimensions of workload and total score for each application averaged across tasks and end-users.</p

“Grau-Gelb” (engl. “grey-yellow”) - a painting created with the Brain Painting application by a locked-in end user with amyotrophic lateral sclerosis (© J Thiele, with permission).

<p>“Grau-Gelb” (engl. “grey-yellow”) - a painting created with the Brain Painting application by a locked-in end user with amyotrophic lateral sclerosis (© J Thiele, with permission).</p

Summary of evaluation results.

1<p>4 sessions (copy spelling, free spelling, emailing, internet surfing).</p>2<p>data refer to the last of 5 free painting sessions.</p>3<p>Utility metric.</p>4<p>3 sessions (copy spelling with and without EMG correction, free spelling (sentence) and emailing).</p>5<p>ITR for BCI only; EMG correction not included.</p>6<p>6 sessions (screening, copy task and free mode playing).</p>7<p>the end-user stated “maybe”.</p>8<p>only 4 of 9 end-users were asked this question.</p><p>Summary of evaluation results.</p

Evaluation metrics for each aspect of usability.

<p>NASA-TLX  =  NASA Task Load Index.</p><p>QUEST  =  Quebec User Evaluation of Satisfaction with Assistive Technology.</p><p>ATD-PA  =  Assistive Technology Device Predisposition Assessment.</p><p>VAS  =  visual analogue scale.</p><p>Evaluation metrics for each aspect of usability.</p