Information Technology Reference
In-Depth Information
Level 1
Level 1
Level 2
Level 2
Stage
Stage
Level
Level
Augend 1
0-1000 [ms]
Augend 1
0-1000 [ms]
Augend 2
1000-2000 [ms]
Augend 2
1000-2000 [ms]
+
+
2000-4000 [ms]
2000-4000 [ms]
Addend 1
4000-5000 [ms]
Addend 1
4000-5000 [ms]
Addend 2
5000-6000 [ms]
Addend 2
5000-6000 [ms]
=
=
6000-8000 [ms]
6000-8000 [ms]
200
200
400
400
600
600
800
800
1000
1000
200
200
400
400
600
600
800
800
1000
1000
[ms]
[ms]
Fig. 5.
The spatiotemporal feature of a computation process represented by Level 1
and Level 2 topographies
4.2
Potential Topograph Analysis
Figure 5 shows the spatiotemporal feature of a computation process represented
by Level 1 and Level 2 topographies. Different from ERP, the potential topogra-
phies use only the presentation trigger signal in augend presented. We obtain these
topographies by adding the average of seven subjects using an ordinary EEG anal-
ysis tool. In this research, we focus on investigating the difference between Level 1
and Level 2 in the computation process with respect to 200 msec intervals at the
computation stages for a task. Although both topographies denote noticeable po-
tentials with respect to augend or addend presented, it can be confirmed that the
potential distribution is with some difference between these topographies, in par-
ticular, in the equal sign stage. According to testee questionnaires, the computing
time is enough because Level 1 is easy. Therefore, it is guessed that the subjects
were able to do the confirmation computation in the last stage.
4.3
ACT-R Simulation
ACT-R is applied to the two digits computation problem for deeply understand-
ing the meaning of the results obtained by ERP and topographies. In particular,
comparing the computation processes in Level 1 (without carry) and Level 2
(with carry). In this study, a present latest version ACT-R 6 was used.
