Regarding the research questions (see section 2.2.1), the following conclusions are
made from the project results and findings:
RQ1: That one electrode in the forehead can replace a grid of, or several, electrodes is highly unlikely. No papers were found of previous studies, were only one
electrode have been used. The experience from this study, is that mental efforts
that are relatively safe to classify did not work. There can however be other reasons for this than just the single electrode, but at least it suggest that one is not
adequate.
RQ2: Having the experience of using both the NeuroSky mindset and traditional
EEG equipment, NeuroSky fulfills the expectations as described in the early chapters. More interestingly, the limitation that was most profound with the mindset
was the static electrode placement. It can be moved to a certain degree, but not
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enough to get it away from the forehead. Also, one or two additional sensors would
have been great. The Emotive headset, featuring 14 electrodes (see section 4.2.1),
would be the recommended choice for this upgrade. It is only slightly more expensive. The connected limitation with placement is that the sensor is heavily
influenced by blink. However, the reason the electrode is placed on the forehead,
is because people do not have hair there, which is a requirement for this type of
dry sensor.