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Table 4: Recognition rates of the three states of the im-
proved system (%).
Neutral
Strongly-
staring
Softly-
staring
Widely-
Opening
Softly-
opening
Average 93.0 91.0 81.0 94.0 74.0
SD 6.4 7.0 9.4 6.6 6.6
basis of the results, we find that the eyelid-movement
input method improves the user’s immersive impres-
sion more significantly than the mouse input method.
Therefore, we conclude that it is important to immerse
an input method in an immersive virtual environment
because the user can use it intuitively and does not
have to be concerned about the seam between the real
and the virtual worlds. We also conclude that physio-
logical data are useful in continuously and objectively
evaluating usability of an input method.
For future work, we plan to further improve
the user’s immersive experience by applying real-
world embodiment movements and emotions esti-
mated from a user’s physiological data, such as EMG,
SC, BVP, brain waves and cerebral blood flow.
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