Psychology: Research and Review
Table 3 Difficulty and discrimination power of items in version A of the TDE-II
From: Development of the Arithmetic Subtest of the School Achievement Test-Second Edition
Items | Difficulty | Discrimination | Items | Difficulty | Discrimination |
|---|---|---|---|---|---|
A2 | −3.3375 | 1.5039 | A28 | −0.6929 | 3.4331 |
A7 | −3.2336 | 1.6934 | A36 | −0.6369 | 3.6589 |
A18 | −2.7796 | 2.4006 | A33 | −0.4758 | 5.27 |
A13 | −2.7351 | 1.9641 | A27 | −0.4697 | 4.9345 |
A9 | −2.3072 | 3.113 | A37 | −0.4043 | 3.9365 |
A3 | −2.1235 | 2.0514 | A39 | −0.3681 | 4.4655 |
A15 | −2.0947 | 2.5557 | A31 | −0.3645 | 8.5817 |
A10 | −1.9997 | 4.0321 | A53 | 0.1308 | 3.4349 |
A16 | −1.8 | 2.2701 | A44 | 0.2164 | 3.5976 |
A17 | −1.7922 | 3.2982 | A54 | 0.3288 | 3.3836 |
A14 | −1.6235 | 2.7877 | A58 | 0.5078 | 4.0837 |
A19 | −1.5748 | 3.1029 | A50 | 0.5188 | 3.151 |
A20 | −1.4458 | 5.147 | A59 | 0.5835 | 4.5851 |
A22 | −1.415 | 2.5523 | A52 | 0.6275 | 3.8564 |
A23 | −1.1939 | 2.9703 | A56 | 0.7888 | 3.2923 |
A26 | −1.0552 | 5.0518 | A63 | 0.8019 | 4.596 |
A24 | −0.9618 | 4.2261 | A57 | 0.8577 | 4.4113 |
A30 | −0.8141 | 3.8369 | A55 | 0.922 | 2.2936 |
A32 | −0.7083 | 3.2816 |