Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Average psychometric data across formats (mean ± SEM).
| SF | NSF | |
|---|---|---|
| D | 0.228 ± 0.006 | 0.278 ± 0.008* |
| rpbis | 0.273 ± 0.006 | 0.291 ± 0.006** |
| NFD (%) | 70.5 ± 0.017 | 56.5 ± 0.022** |
| Difficulty (p-value) | 0.809 ± 0.006 | 0.741 ± 0.007* |
*p < 0.001; **p < 0.05; SEM = Standard Error of the mean; SF = Standard Format; NSF = Non-Standard Format; D = Discrimination Index; rpbis = Point-biserial correlation; NFD = Non-functional Distractors.
