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Figure 3 | BMC Neuroscience

Figure 3

From: Online detection of error-related potentials boosts the performance of mental typewriters

Figure 3

Session Design. In total, the experiment consists of 11 blocks. First, the Center Speller is run in offline mode (18 characters), then the ErrP Calibration Speller is run in fixed-spelling mode (83 characters). These two blocks (gray) are used to train the spelling classifier and the ErrP classifier A, respectively. Subsequently, 4 Center Speller blocks are performed in fixed-spelling mode (20 characters per block), and the data is used to train ErrP classifier B. Then the last 5 Center Speller blocks are performed. The three different conditions have been interleaved during the 9 blocks: spelling without ErrP detection (black), spelling with ErrP detection using ErrP classifier A (magenta) and spelling with ErrP detection using ErrP classifier B (blue).

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