Table 3.
Item difficulty (b), discrimination (a), and the discrimination parameter’s standard errors (s.e.) for the Silly Sounds Stroop (Inhibitory Control) task.
| Item | a | (s.e.) | Cat | Dog | b | ||
|---|---|---|---|---|---|---|---|
| a | (s.e.) | a | (s.e.) | ||||
| 3 | 1.40 | (0.16) | 0.38 | (0.14) | ---- | ---- | −0.96 |
| 5 | 1.38 | (0.16) | ---- | ---- | 0.65 | (0.12) | −0.99 |
| 7 | 1.86 | (0.20) | ---- | ---- | 0.72 | (0.13) | −0.78 |
| 9 | 1.69 | (0.17) | 0.69 | (0.14) | ---- | ---- | −0.20 |
| 11 | 4.42 | (0.64) | 1.58 | (0.29) | ---- | ---- | −0.38 |
| 13 | 5.10 | (0.82) | 2.20 | (0.43) | ---- | ---- | −0.31 |
| 17 | 0.92 | (0.13) | ---- | ---- | 1.16 | (0.14) | −0.43 |
| 19 | 0.54 | (0.15) | 1.79 | (0.22) | ---- | ---- | 0.04 |
| 21 | 0.96 | (0.14) | ---- | ---- | 1.44 | (0.16) | −0.22 |
| 23 | 1.20 | (0.33) | 3.86 | (0.88) | ---- | ---- | 0.18 |
| 25 | 1.46 | (0.23) | 2.49 | (0.31) | ---- | ---- | −0.09 |
| 29 | 1.31 | (0.21) | ---- | ---- | 2.98 | (0.31) | 0.00 |
| 31 | 1.77 | (0.39) | ---- | ---- | 5.33 | (0.93) | −0.13 |
| 33 | 1.45 | (0.26) | ---- | ---- | 3.69 | (0.44) | −0.04 |
Note: This model was originally parameterized using an intercept parameter instead of the traditional b-parameter. The b-parameter value was obtained from the intercept value post hoc. No standard error for the b-parameter is available for this model.