Table 5.
Relationships Between Supplementary Items, Ability Estimates and Total Scores
| Item # | Ability Estimates (IRT) | Total Scores (CTT) | 
|---|---|---|
| 13a | 0.29** | 0.19** | 
| 13b | 0.18* | 0.11* | 
| 13c | 0.16* | 0.11 | 
| 13d | 0.12* | 0.10 | 
| 13e | 0.12* | .012* | 
| 13f | 0.06 | 0.06 | 
| 13g | 0.08 | 0.08 | 
| 13h | 0.14* | 0.15* | 
| 13i | 0.19** | 0.20** | 
| 13j | 0.15* | 0.19** | 
| 13k | 0.08 | 0.11* | 
| 13l | 0.19** | 0.17* | 
| 13m | 0.12* | 0.12* | 
| 13n | 0.12* | 0.11* | 
| 13o | 0.08 | 0.08 | 
| 13p | 0.21** | 0.21** | 
| 13q | 0.12* | 0.12* | 
| 13r | 0.14* | 0.14* | 
| 13s | 0.13* | 0.11* | 
| 14 | 0.05 | 0.03 | 
| 15 | 0.34** | 0.31** | 
| 16 | 0.11* | 0.11* | 
| 17 | 0.33** | 0.32** | 
Note. Numbers represent Pearson correlations. IRT = Item Response Theory; CTT = Classical Test Theory.
p ≤ .001,
p < .05.