Psychology: Research and Review
Table 2 t-Test results for item discrimination
Items | Bottom 27% Top 27% | N | Mean | Std. Deviation | df | t-value | p |
|---|---|---|---|---|---|---|---|
Item1 | Bottom 27% Top 27% | 632 | 2.6669 4.2848 | .93617 .95934 | 1262 | −30.343 | 0.000 |
Item 2 | Bottom 27% Top 27% | 632 | 3.1440 4.6946 | .89363 .54302 | 1262 | −37.280 | 0.000 |
Item 3 | Bottom 27% Top 27% | 632 | 3.1424 4.7563 | .93800 .46506 | 1262 | −38.753 | 0.000 |
Item 4 | Bottom 27% Top 27% | 632 | 2.9794 4.7185 | .94603 .52165 | 1262 | −40.470 | 0.000 |
Item 5 | Bottom 27% Top 27% | 632 | 3.1155 4.6566 | .89952 .59647 | 1262 | −35.897 | 0.000 |
Item 6 | Bottom 27% Top 27% | 632 | 3.1458 4.7437 | .93946 .48508 | 1262 | −37.992 | 0.000 |
Item 7 | Bottom 27% Top 27% | 632 | 3.2676 4.7753 | .94035 .43988 | 1262 | −36.512 | 0.000 |
Item 8 | Bottom 27% Top 27% | 632 | 3.1187 4.6013 | .93539 .63386 | 1262 | −32.986 | 0.000 |
Item 9 | Bottom 27% Top 27% | 632 | 3.2184 4.6775 | .95199 .52803 | 1262 | −33.696 | 0.000 |
Item 10 | Bottom 27% Top 27% | 632 | 3.1392 4.6171 | .91280 .57598 | 1262 | −34.422 | 0.000 |
Item 11 | Bottom 27% Top 27% | 632 | 2.9396 4.3861 | .90374 .72514 | 1262 | −31.384 | 0.000 |
Item 12 | Bottom 27% Top 27% | 632 | 3.0285 4.6013 | .89326 .57898 | 1262 | −37.144 | 0.000 |
Item 13 | Bottom 27% Top 27% | 632 | 3.5253 4.8054 | .83276 .41191 | 1262 | −34.637 | 0.000 |
Item 14 | Bottom 27% Top 27% | 632 | 3.5728 4.7848 | .82036 .45865 | 1262 | −32.420 | 0.000 |
Item 15 | Bottom 27% Top 27% | 632 | 3.4509 4.7563 | .85054 .50430 | 1262 | −33.188 | 0.000 |
Item 16 | Bottom 27% Top 27% | 632 | 3.3481 4.7215 | .84769 .52961 | 1262 | −34.543 | 0.000 |
Item 17 | Bottom 27% Top 27% | 632 | 2.6630 4.0174 | .98097 1.09226 | 1262 | −23.193 | 0.000 |
Item 18 | Bottom 27% Top 27% | 632 | 3.0095 4.5380 | .82928 .72873 | 1262 | −34.807 | 0.000 |
Item 19 | Bottom 27% Top 27% | 632 | 3.1282 4.6203 | .79282 .64050 | 1262 | −36.803 | 0.000 |
Item 20 | Bottom 27% Top 27% | 632 | 3.4335 4.7220 | .82089 .51376 | 1262 | −33.449 | 0.000 |
Item 21 | Bottom 27% Top 27% | 632 | 3.3608 4.6946 | .88994 .54593 | 1262 | −32.118 | 0.000 |
Item 22 | Bottom 27% Top 27% | 632 | 3.0712 4.6044 | .90412 .58387 | 1262 | −35.814 | 0.000 |
Item 23 | Bottom 27% Top 27% | 632 | 3.2231 4.6820 | .89508 .52674 | 1262 | −35.313 | 0.000 |
Item 24 | Bottom 27% Top 27% | 632 | 3.0380 4.5424 | .91396 .68157 | 1262 | −33.172 | 0.000 |