Table 5.
IRT Difficulty Parameter Estimates by Sex
| Mother-Report | Father-Report | Teacher-Report | ||||
|---|---|---|---|---|---|---|
| Girls | Boys | Girls | Boys | Girls | Boys | |
| Lacks guilt | 1.539 | 1.375 | 1.384 | 0.991 | 1.681 | 1.281 |
| Breaks rules | 0.714 | 0.288 | 0.609 | 0.274 | 1.749 | 1.016 |
| Delinquent friends | 3.368 | 1.784 | 2.604 | 2.032 | 2.263 | 1.388 |
| Lies or cheats | 1.090 | 0.689 | 0.938 | 0.874 | 1.686 | 1.531 |
| Prefers older kids | 2.013 | 1.274 | 1.214 | 1.465 | 8.217 † | 4.355 |
| Swears | 3.090 | 1.887 | 3.014 † | 1.977 | 3.334 | 2.333 |
| Sets fires | 11.144 | 3.710 | - | 3.198 | - | - |
| Steals at home | 2.072 | 2.002 | 2.426 | 1.873 | - | - |
| Steals outside the home | 2.917 | 2.132 | 3.561 | 2.236 | 2.169 | 2.712 |
| Runs away | 8.396 † | 4.182 | 17.244 † | 5.127 | - | - |
| Vandalism | 3.356 | 2.647 | 3.811 | 2.884 | - | - |
| Truancy | 4.579 | 3.732 | 7.739 | 5.607 | 6.460 † | 5.555 |
| Mean for all RB items | 2.353 | 2.142 | 2.698 | 2.378 | 2.147 | 2.521 |
| Mean for legal items | 1.969 | 1.216 | 1.350 | 1.269 | 2.143 | 1.984 |
| Mean for illegal items | 2.814 | 3.068 | 4.384 | 3.488 | -- | -- |
Note. Several items (‘sets fires’, ‘runs away’, ‘vandalism’, and ‘steals at home’) are assessed only on the CBCL, and thus no teacher informant-reports were available for those items. Illegal item means for teachers are accordingly omitted. Only one father reported that his daughter set fires, and thus this item was omitted for girls. The top portion of the table contains the more normative/legal RB behaviors (e.g., swearing, lying). The middle portion of the table contains the less normative/illegal behaviors (e.g., stealing, fire setting). All estimates in boys were significantly greater than zero at p < .05. All estimates in girls were significantly greater than zero at p < .05, with the exception of the parameters marked with a † (i.e., truancy, swears runs away, prefers older kids)