Research Article
Towards a Brain-Sensitive Intelligent Tutoring System: Detecting Emotions from Brainwaves
Table 2
Subbands in beta frequency band.
| Wave | Frequency | Mental state |
| Beta1 | 12–15 Hz | Relaxed focus; improved attention. | Beta2 | 15–20 Hz | Vigilance; logical reasoning; conscious attention. | Beta3 | >20 Hz | Fully awakened state; vigilance; tension-anxiety-stress; confusion; irritability; psychosomatic problems. |
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