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Assessment of mental workload: A new electrophysiological method based on intra-block averaging of ERP amplitudes

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Academic year: 2021

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Fig. 2. Averaging of ERP waveforms in 8 blocks of 5 epochs for P2 (triangles), P3a (black circles) and P3b (white circles) components in infrequent target auditory stimuli.
Fig. 3 shows normalized magnitude values for measurement of mental workload. Regarding the three ERP components, the nor-malized magnitude was signi fi cantly higher in the easier condition compared to the more dif fi cult condition (P2 component: p o 0.01;

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