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Table 4 Decision study modelling changes in reliability co-efficient, relative and absolute standard of errors of measurement when increasing the numbers of tasks

From: The reliability and validity of a portfolio designed as a programmatic assessment of performance in an integrated clinical placement

Tasks

Reliability coefficient

Relative SEM

Relative 95% CI

Absolute SEM

Absolute 95% CI

20

0.72

2.00

3.92

2.60

5.09

16

0.67

2.24

4.38

2.91

5.69

12

0.60

2.58

5.06

3.35

6.58

10

0.56

2.83

5.54

3.68

7.20

8

0.50

3.16

6.20

4.11

8.05

6

0.43

3.65

7.16

4.74

9.30

4

0.34

4.47

8.77

5.81

11.39