Information Technology Reference
In-Depth Information
Augend
Augend
+
+
Addend
Addend
=
=
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
-5
-5
-5
-5
-5
-5
-5
-5
AFz
AFz
0
0
0
0
0
0
0
0
5
-200
5
-200
5
-200
5
-200
5
-200
5
-200
5
-200
5
-200
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
1000
1000
1000
1000
1000
1000
1000
1000
: On-task Level 1
: On-task Level 1
: On-task Level 1
: On-task Level 2 (Reference)
: On-task Level 2 (Reference)
: On-task Level 2 (Reference)
: Off-task
: Off-task
: Off-task
Augend
Augend
+
+
Addend
Addend
=
=
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
-4
-4
-4
-4
-4
-4
-4
-4
0
0
0
0
0
0
0
0
CP3
CP3
4
-200
4
-200
4
-200
4
-200
4
-200
4
-200
4
-200
4
-200
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
1000
1000
1000
1000
1000
1000
1000
1000
: On-task Level 1
: On-task Level 1
: On-task Level 1
: On-task Level 2 (Reference)
: On-task Level 2 (Reference)
: On-task Level 2 (Reference)
: Off-task
: Off-task
: Off-task
Augend
Augend
+
+
Addend
Addend
=
=
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
[uV]
-4
-4
-4
-4
-4
-4
-4
-4
Oz
Oz
0
0
0
0
0
0
0
0
4
-200
4
-200
4
-200
4
-200
4
-200
4
-200
4
-200
4
-200
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
[ms]
1000
1000
1000
1000
1000
1000
1000
1000
: On-task Level 1
: On-task Level 1
: On-task Level 1
: On-task Level 2 (Reference)
: On-task Level 2 (Reference)
: On-task Level 2 (Reference)
: Off-task
: Off-task
: Off-task
Fig. 4.
ERP comparison among on-task Level 1, on-task Level 2 and off-task
It is suggested that the computing activity is started at once when an addend
is presented. Moreover, there is a little difference between Level 1 (without carry)
and Level 2 (with carry) from a global view. However, the delay is caused in
Level 2 with carry about 25 msec in the stages of addend and equal presented.
On the other hand, in comparison between on-task and off-task, both amplitude
and timing are resembled in the first half of the computation process, but it
is also confirmed that the latent time of off-task is short when entering the
latter half of the computation process. It is guessed that this is related to some
attention to the number related cognition. We can also see that comparing with
off-task, there is the latency of reaction with 100 to 200 msec in the peak when
addend and equal are presented in on-task.
