| 1D | One-dimensional |
| 2D | Two-dimensional |
| AAC | Augmentative and alternative communication |
| ANOVA | Analysis of variance |
| BCI | Brain–computer interface |
| EEG | Electroencephalography |
| EMG | Electromyography |
| EOG | Electrooculography |
| GUI | Graphical user interface |
| HCI | Human–computer interaction |
| ID | Index of difficulty |
| IDe | Effective index of difficulty |
| ITR | Information transfer rate |
| SD | Standard deviation |
| sEMG | Surface electromyography |
| SMR | Sensorimotor rhythm |
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