114
CHAPTER 3. EXPERIMENTS
Table 3.36:
ANOVA for Kendall's ( (Exp 34)
Source
85
MS
E
4
Between subjects:
0.255
Block Design (BD)
0.128
2
0.99
3.479
Error
27
0.129
Within subjects:
0.088
Session
0.044
2
2.11
0.028
BD by Session
0.007
0.25
4
1.542
Session by Error
0.029
54
Discrimination Cycles
In Table 3.35 the average (-values with standard deviations for each group and session are
listed. All groups had comparable average (-values in the first and more or less in the
following sessions. In the first session subjects in Group S made choices under a resolution
block design reaching an average (-value of .73, whereas subjects in Group P had an average
value of .66 under the repetition block design. The subjects of Group N made choices under
the random block design and reached a higher average (-value of .77.
Table 3.37: Stepwise Discriminant Analysis on Dicycles (Exp 34)
Removed
Step Entered
Number Partial R° Partial F pF
Session 1
No variables entered
Session 2
1
0.143
1 3-dicycles
0.125
2.250
Session 3
No variables entered
The same type of analysis was applied to the number of intransitive triples using Kendall's
(as a standardized measure (see Table 3.36).17 There was no significant effect of block design
(F[2,27 « 1, ns) and no effect of session (Fs2,54 = 2.11, p = 0.131).
For each session stepwise discriminant analyses were performed on the number of dicycles,
i.e. the coefficients z of the polynomial %, and the number of ear dicycles from the ear
decompositions by sequence. The numbers of k-dicycles were entered stepwise as dependent
variables starting with dicycles which discriminated best between groups. The results of the
analysis are given in Table 3.37. Variables were entered and excluded at a significance level
of p « 0.15.
Only in Session 2 the three block designs could be weakly discriminated by the number of
3-dicycles whereas in Session 1 and 3 no variables were entered. The stepwise discriminant
analysis on the number of ear dicycles revealed some differences between groups in all three
sessions. The results are summarized in Table 3.38.
17A sphericity test revealed no significant violation of homogeneity for the repeated measurements over
sessions (approximate x22 = 5.25,p = 0.07).