Hi!
I'm new to R for my thesis and I tried to understand the basics of R and statistics with 'how to' youtube videos.
I need to test if there are correlations between ordinal data (questionnaires with scoring systems, one of them a likert-scale).
My promotor said something about a cumulative link model, sadly I never heard about that before and I don't really find info about it on the internet...
Is their somebody who can explain why you should use this function in this case?
I post some data below...
Sub Groep Niet_Behandeling 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17
1 1 BE 1 2 1 4 2 1 3 3 4 1 1 1 1 1 1 1 3 1
2 23 BE 1 2 4 2 1 1 1 2 4 1 1 1 1 5 1 1 1 1
3 24 BE 1 1 4 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1
4 25 BEBD 1 2 2 4 2 2 2 4 4 3 3 3 3 3 3 3 3 3
5 27 BE 1 2 3 4 1 3 4 1 4 2 4 1 1 1 1 1 1 1
6 32 BEBD 1 1 4 2 4 1 4 1 4 1 5 1 3 1 1 1 1 1
7 34 BE 1 2 5 4 4 4 3 4 4 4 3 3 3 3 2 1 3 3
8 37 BE 1 3 3 4 2 1 3 2 2 3 1 1 1 3 1 1 1 1
9 38 BE 1 4 5 1 3 2 4 4 4 1 1 3 2 1 1 1 4 4
10 41 BE 1 3 3 3 2 2 4 4 3 2 2 2 2 2 1 1 1 1
11 45 BE 1 1 5 3 3 1 2 4 5 3 2 2 3 2 2 1 4 3
12 55 BEBD 1 1 1 1 1 1 3 2 4 1 4 1 1 5 1 1 1 1
13 58 BE 1 4 3 4 2 3 2 2 3 1 2 1 3 2 1 1 2 1
14 65 BEBD 1 4 2 5 1 1 3 2 3 1 1 1 1 1 1 1 1 1
15 66 BE 1 4 5 4 2 1 2 3 2 1 1 1 1 1 1 1 1 1
16 68 BE 1 4 2 4 5 3 4 4 3 2 2 2 2 2 1 1 2 2
17 72 BEBD 1 4 2 5 1 1 1 1 3 1 1 1 1 1 1 1 2 1
18 73 BEBD 1 4 2 4 3 2 2 2 4 1 2 2 1 2 1 1 2 1
2.18 2.19 2.20 2.21 2.22 EDE_Q_EC EDE_R EDE-Q_WC EDE_Q_SC EDE_Q_Totaal
1 3 4 3 5 3 24 28 30 30 132
2 4 1 1 2 4 5 10 8 13 39
3 4 3 2 1 1 23 28 30 48 129
4 4 4 3 4 3 22 17 48 30 117
5 1 1 1 2 1 23 17 29 47 120
6 1 1 4 2 1 10 2 16 34 66
7 3 3 3 4 3 17 6 27 45 95
8 1 1 1 3 3 4 3 18 35 62
9 5 4 4 1 1 16 10 29 48 103
10 1 1 1 1 1 4 4 2 5 17
11 3 5 4 4 3 19 12 25 40 97
12 1 3 1 5 1 19 27 30 48 126
13 1 1 3 4 3 11 14 25 38 91
14 1 2 3 5 3 17 11 21 38 92
15 2 2 1 5 3 7 15 13 28 68
16 3 4 4 5 1 15 18 27 43 106
17 1 1 1 4 3 4 15 14 13 49
18 1 3 2 5 3 4 3 11 22 42