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controller waveform change with respect to each manipulation. This result shows
that the rhythm controller realizes requirement 3.
In a normal controller, operators cannot manipulate the avatar while creating pre-
stored action, because avatar motion corresponds one-to-one with controller input.
This marks a huge difference between the rhythm controller and a normal con-
troller. If operators acquire pro
!
ciency in avatar manipulation through the rhythm
controller, they treat their avatars like parts of their bodies while creating pre-stored
action with freedom.
Further, we examined how an operator's controller manipulation changes when
the operator performs similar avatar motion in different situations using a rhythm
controller. Speci
!
cally, we conducted two different experiments:
•
Forward and backward movement experiment: The subject freely moves the
•
Chase up experiment: The subject moves the avatar backward and forward
while avoiding an automatic avatar that attempts to drive the subject's avatar
into a corner (Fig.
5
b).
All subjects of these experiments were adept at operating the avatar using the
rhythm controller. From experimental results, it is found that 1/f
fl
fluctuation is
observed in the rhythm controller waveform in the chase up experiment, where
operators have to provide for the possibility of creating action. However, 1/f
fl
uc-
tuation is not observed in the forward and backward movement experiment, where
operators do not have to provide for the possibility of creating action. These results
show that operators change the pre-stored action through the rhythm controller
depending on the situation. In other words, even if the avatar motion is the same,
the
fl
fluctuation of controller operation (pre-stored action) changes according to the
situation.
Consequently, we consider factors such as the human's internal states or feelings
and context to be expressed in the rhythm controller operation. We discuss this
issue in Sect.
3
in detail. The abovementioned results show that the rhythm con-
troller has the potential to enable operators to express their mental and physical
functions in their controller operation.
Fig. 5 Experiment to investigate the possibility of creating action. a Forward and backward
movement experiment. b Chase up experiment
