Information Technology Reference
In-Depth Information
Table 1.
Stimulus-locked bins for the EEG data
Condition
Inner Number
Category
Followed
Response
Bin
Lottery Condition
C-300
No
C-300NoLott
Lottery Condition
C-150
No
C-150NoLott
Lottery Condition
C-50
No
C-50NoLott
Lottery Condition
Center
No
CenterNoLott
Lottery Condition
Center
Yes
CenterYesLott
Lottery Condition
C+50
Yes
C+50YesLott
Lottery Condition
C+150
Yes
C+150YesLott
Lottery Condition
C+300
Yes
C+300YesLott
Bisection Condition
C-300
No
C-300NoBisec
Bisection Condition
C-150
No
C-150NoBisec
Bisection Condition
C-50
No
C-50NoBisec
Bisection Condition
Center
No
CenterNoBisec
Bisection Condition
Center
Yes
CenterYesBisec
Bisection Condition
C+50
Yes
C+50YesBisec
Bisection Condition
C+150
Yes
C+150YesBisec
Bisection Condition
C+300
Yes
C+300YesBisec
3 Results
3.1 Behavioral Data
A within-subject analysis of variance (ANOVA) was performed for the behavioral
data, with the condition, the inner number category and the scaled factor serving as
inner subject factors. The ANOVA revealed no significant difference between both
conditions (F=0.307, df=1, p=0.588). Further verification of both conditions using a
paired t-test resulted in no significant values on a 5 % significant level (see table and
figure 8 in the Appendix). Furthermore, a significant value is existent for the scaled
factors (F=1.313, df=6.762, p=0.012), but not for other factor interactions (see table 3
in the Appendix).
3.2 EEG Data
The figures 4 and 5 show stimulus-locked ERPs at the CZ electrode for the bins de-
scribed in the previous section. Most pronounced differences are located about
500 ms poststimulus. ERPs related to the center position (C-50, C, C+50) hardly de-
viate, whereas the categories C-300, C-150, C+150 and C+300 tend to have a larger
positivity. Obviously, the most pronounced positivity is related to the bin in the lot-
tery condition.
ERP waveforms were analyzed by a set of ANOVAs, with the focus being directed
on the mean amplitudes in different time periods and differentiated by the lateral,
parasagital and midline location as well as by the followed response.
