Question

A hospital is interested in evaluating inter-rater reliability in nurse assessment of dementia. A random selection of four nurses evaluated six patients (randomly assigned) and recorded a dementia score. The data is available in “Nurse ICC data”. Use a one-way, random-effects model (software of your choice) to find estimates of

1. the variance components and
2. the intraclass correlation coefficient (ICC)

Note that you won’t be including “patient” in your model. Patient-to-patient variability and nurse*patient interaction will be included in the error (“within”) term.

patient	nurse	rating
1	1	9
1	2	2
1	3	5
1	4	8
2	1	6
2	2	1
2	3	3
2	4	2
3	1	8
3	2	4
3	3	6
3	4	8
4	1	7
4	2	1
4	3	2
4	4	6
5	1	10
5	2	5
5	3	6
5	4	9
6	1	6
6	2	2
6	3	4
6	4	7

Answer 1

Software : Excel

Output :-

A . Variance componets :

                      Since ,

                                       

                       So,

                       

B. Intraclass correlation :-