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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