5. The method of claim 1 , further comprising: measuring the person's pupillary response; extracting pupil features from the pupillary response; presenting the extracted pupil features to a computer-implemented classifier trained to detect patterns of extracted pupil features and to generate a pupil output indicative of the occurrence or absence of a significant brain response; and combining the second level EEG output and the pupil output to generate a fused output indicative of the occurrence or absence of the significant brain response.
5. The method of claim 1 , further comprising: measuring the person's pupillary response; extracting pupil features from the pupillary response; presenting the extracted pupil features to a computer-implemented classifier trained to detect patterns of extracted pupil features and to generate a pupil output indicative of the occurrence or absence of a significant brain response; and combining the second level EEG output and the pupil output to generate a fused output indicative of the occurrence or absence of the significant brain response. 6. The method of claim 5 , wherein the first level outputs are combined using feature-level fusion to generate the second level EEG output that is combined with the pupil output using decision-level fusion to generate the fused output.