DIFFICULTY_PARAMETER_B2

Business Definition

IRT difficulty parameter (b2) for polytomous or multi-step items under graded response or partial credit models. This parameter represents the threshold for achieving a higher score category. Null for dichotomous items or items without polytomous calibration.

Data Type

FLOAT

Nullable

Yes

Last Updated

2026-01-13T04:05:42 by LEARNOSITY_ITEMS_DIM_ANALYSIS