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.
Item Parameters.
| Item quality | P(0) | P(1) |
|---|---|---|
| HD-LV | U(0.05, 0.15) | U(0.85, 0.95) |
| HD-HV | U(0.00, 0.20) | U(0.80, 1.00) |
| LD-LV | U(0.15, 0.25) | U(0.75, 0.85) |
| LD-HV | U(0.10, 0.30) | U(0.70, 0.90) |
Note. HD-LV = high discrimination–low variance; HD-HV = high discrimination–high variance; LD-LV = low discrimination–low variance; LD-HV = low discrimination–high variance.
