Table 4. Item parameter estimates (SEs) of a 3-parameter unidimensional item response model.
Item | Target | a (SE) | b (SE) | c (SE) | Item | Target | a (SE) | b (SE) | c (SE) |
---|---|---|---|---|---|---|---|---|---|
1 | 1 | 1.01(0.24) | -5.67(1.12) | 0.00(0.07) | 37 | 2 | 2.24(0.43) | -1.94(0.30) | 0.30(0.02) |
2 | 1 | 1.30(0.16) | -3.65(0.32) | 0.00(0.01) | 38 | 5 | 1.23(0.12) | 0.64(0.06) | 0.00(0.18) |
3 | 1 | 1.43(0.19) | -3.04(0.50) | 0.15(0.32) | 39 | 1 | 2.11(0.20) | -1.13(0.22) | 0.23(0.02) |
4 | 2 | 1.36(0.16) | -3.55(0.30) | 0.00(0.01) | 40 | 6 | 1.93(0.25) | -0.68(0.13) | 0.40(0.10) |
5 | 2 | 1.13(0.13) | -3.49(0.42) | 0.00(0.21) | 41 | 3 | 1.91(0.20) | 0.17(0.05) | 0.40(0.06) |
6 | 2 | 1.19(0.19) | -3.34(0.97) | 0.19(0.57) | 42 | 1 | 2.81(0.25) | -0.17(0.16) | 0.19(0.02) |
7 | 3 | 1.04(0.21) | -5.18(0.83) | 0.00(0.05) | 43 | 4 | 1.38(0.16) | -0.35(0.07) | 0.26(0.06) |
8 | 3 | 1.08(0.15) | -4.24(0.47) | 0.00(0.01) | 44 | 3 | 2.35(0.21) | -1.39(0.41) | 0.27(0.04) |
9 | 3 | 1.69(0.20) | -3.38(0.26) | 0.00(0.01) | 45 | 6 | 1.29(0.19) | 0.59(0.07) | 0.50(0.13) |
10 | 4 | 1.55(0.19) | -3.47(0.28) | 0.00(0.00) | 46 | 2 | 1.98(0.24) | -0.76(0.26) | 0.32(0.03) |
11 | 4 | 1.18(0.13) | -3.39(0.27) | 0.00(0.00) | 47 | 5 | 1.17(0.14) | -0.18(0.07) | 0.31(0.09) |
12 | 4 | 1.37(0.18) | -3.39(0.59) | 0.01(0.44) | 48 | 1 | 2.88(0.29) | -0.67(0.90) | 0.33(0.03) |
13 | 5 | 1.24(0.11) | -2.64(0.17) | 0.00(0.01) | 49 | 6 | 0.72(0.18) | 0.34(0.13) | 0.35(0.20) |
14 | 5 | 1.24(0.12) | -3.04(0.22) | 0.00(0.00) | 50 | 4 | 1.44(0.19) | 1.58(0.09) | 0.35(0.04) |
15 | 5 | 1.43(0.17) | -3.49(0.29) | 0.00(0.01) | 51 | 2 | 1.89(0.34) | -0.60(0.17) | 0.27(0.02) |
16 | 6 | 1.50(0.24) | -3.44(0.75) | 0.01(0.61) | 52 | 3 | 1.38(0.14) | -0.11(0.16) | 0.23(0.07) |
17 | 6 | 1.34(0.17) | -2.69(0.51) | 0.08(0.34) | 53 | 3 | 1.47(0.19) | -0.14(0.14) | 0.40(0.05) |
18 | 6 | 2.25(0.36) | -2.23(0.33) | 0.49(0.18) | 54 | 5 | 1.60(0.19) | 0.15(0.05) | 0.33(0.05) |
19 | 4 | 1.92(0.27) | -2.76(0.36) | 0.12(0.27) | 55 | 1 | 2.94(0.29) | 0.53(0.08) | 0.30(0.02) |
20 | 5 | 1.72(0.16) | -1.01(0.16) | 0.35(0.07) | 56 | 4 | 1.52(0.16) | 1.54(0.10) | 0.18(0.03) |
21 | 6 | 1.43(0.16) | -1.17(0.26) | 0.40(0.10) | 57 | 2 | 1.95(0.42) | -1.25(0.61) | 0.34(0.02) |
22 | 2 | 1.25(0.20) | -0.91(0.38) | 0.25(0.16) | 58 | 6 | 0.88(0.15) | 0.66(0.12) | 0.30(0.18) |
23 | 1 | 2.35(0.23) | 0.17(0.06) | 0.28(0.03) | 59 | 5 | 1.23(0.16) | 0.05(0.06) | 0.24(0.04) |
24 | 3 | 1.32(0.15) | -0.86(0.24) | 0.30(0.10) | 60 | 1 | 2.98(0.31) | 0.63(0.08) | 0.35(0.03) |
25 | 2 | 1.66(0.24) | -0.36(0.20) | 0.47(0.06) | 61 | 4 | 1.68(0.20) | -0.21(0.31) | 0.27(0.03) |
26 | 6 | 1.98(0.24) | -1.64(0.23) | 0.41(0.12) | 62 | 3 | 1.28(0.24) | -0.67(0.17) | 0.57(0.07) |
27 | 4 | 1.67(0.19) | -1.05(0.21) | 0.36(0.09) | 63 | 5 | 1.71(0.20) | 0.20(0.06) | 0.38(0.07) |
28 | 3 | 1.14(0.16) | -0.40(0.27) | 0.38(0.08) | 64 | 1 | 2.32(0.20) | -0.34(0.29) | 0.27(0.02) |
29 | 5 | 1.36(0.14) | -0.86(0.19) | 0.24(0.08) | 65 | 5 | 1.25(0.21) | 0.11(0.09) | 0.44(0.08) |
30 | 4 | 1.35(0.13) | -1.11(0.20) | 0.15(0.10) | 66 | 3 | 1.54(0.15) | -0.29(0.33) | 0.21(0.04) |
31 | 3 | 1.34(0.13) | -0.48(0.16) | 0.14(0.07) | 67 | 6 | 1.34(0.27) | 1.25(0.07) | 0.50(0.09) |
32 | 5 | 1.05(0.16) | -0.35(0.31) | 0.34(0.09) | 68 | 2 | 1.85(0.28) | 1.19(0.30) | 0.22(0.02) |
33 | 6 | 1.54(0.17) | -1.06(0.21) | 0.29(0.10) | 69 | 4 | 0.72(0.19) | 0.63(0.16) | 0.19(0.09) |
34 | 2 | 2.02(0.35) | 1.36(0.09) | 0.37(0.02) | 70 | 6 | 1.34(0.25) | 0.21(0.04) | 0.45(0.04) |
35 | 4 | 1.28(0.20) | -0.81(0.35) | 0.47(0.10) | 71 | 1 | 2.98(0.26) | 1.14(0.16) | 0.25(0.02) |
36 | 1 | 1.62(0.15) | 0.34(0.07) | 0.20(0.03) | 72 | 2 | 1.06(0.21) | -1.94(0.30) | 0.35(0.04) |
Note.
“a”, “b”, and “c” indicate an item discrimination, difficulty, and guessing parameter, respectively.