Table 2.
|
|
|||||
---|---|---|---|---|---|---|
Random item selection | ||||||
0.0 | 0.865 | 0.866 | 0.868 | 0.866 | 0.867 | 0.867 |
0.3 | 0.880 | 0.882 | 0.882 | 0.883 | 0.882 | 0.882 |
0.6 | 0.892 | 0.894 | 0.893 | 0.893 | 0.893 | 0.890 |
Item selection by maximization at the ability estimate | ||||||
0.0 | 0.895 | 0.896 | 0.897 | 0.895 | 0.896 | 0.895 |
0.3 | 0.908 | 0.907 | 0.906 | 0.909 | 0.908 | 0.908 |
0.6 | 0.918 | 0.917 | 0.918 | 0.916 | 0.915 | 0.915 |
Item selection by maximization at the projected estimate | ||||||
0.0 | 0.896 | 0.895 | 0.895 | 0.897 | 0.895 | 0.894 |
0.3 | 0.903 | 0.901 | 0.904 | 0.904 | 0.904 | 0.901 |
0.6 | 0.910 | 0.912 | 0.912 | 0.912 | 0.912 | 0.911 |
Item selection by maximization at the cutoff point | ||||||
0.0 | 0.898 | 0.896 | 0.898 | 0.897 | 0.898 | 0.897 |
0.3 | 0.909 | 0.910 | 0.909 | 0.908 | 0.910 | 0.909 |
0.6 | 0.919 | 0.920 | 0.918 | 0.917 | 0.919 | 0.919 |
Note. SPRT = sequential probability ratio test; = correlation between the abilities; = acceptable error rates; = distance between the cutoff point and boundary of the indifference region.