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Table 4 Difficulty and discrimination power of items in version B of the TDE-II

From: Development of the Arithmetic Subtest of the School Achievement Test-Second Edition

Item Difficulty Discrimination Item Difficulty Discrimination
A38 −0.6484 3.0287 A67 1.1098 5.716
A37 −0.6369 3.3532 A77 1.1859 1.4303
A41 −0.6065 3.4624 A88 1.2549 2.0311
A39 −0.604 4.1499 A90 1.2574 3.2208
A53 −0.0067 3.2261 A82 1.2785 3.8193
A62 0.064 2.5025 A72 1.3361 2.6694
A44 0.0858 3.2814 A69 1.4662 4.0853
A54 0.2088 3.3916 A84 1.6088 2.7979
A50 0.4287 2.7401 A89 1.7578 2.5416
A59 0.5039 4.1512 A86 1.7958 2.4449
A46 0.5444 3.6426 A96 1.8705 3.2276
A52 0.5649 3.046 A85 1.8709 2.3781
A56 0.7565 2.6032 A70 1.946 2.4555
A63 0.7584 4.0741 A68 2.0229 2.2619
A57 0.8137 4.1131 A71 2.045 3.2069
A87 0.8208 2.6471 A97 2.1589 3.8918
A65 0.9048 6.3845 A73 2.1863 2.2984
A64 0.9239 6.278 A98 2.5193 2.446
A61 0.9441 5.2496 A81 2.7061 2.6243
A60 0.9588 5.3662 A100 2.7857 1.7694
A79 1.0391 3.0221 A92 3.2164 1.8715
A74 1.0473 2.846