example_SA_parm: Example standalone item parameter tables
| example_SA_parm | R Documentation |
Example standalone item parameter tables
Description
Example standalone item parameter dataframe for the SA_parm
Usage
data(example_SA_parm)
Format
An object of class data.frame with columns below
a: slope
b1, b2, ..., b_k: difficulty or step difficulty.
For GPCM items, b1, b2, ..., b_k are step difficulty parameters where k is the maximum possible score
of the item that has the largest number of score categories in the test (Score starts from 0).
For example, for two items with 3 and 4 categories (0,1,2 & 0,1,2,3), there should be column b1, b2 and b3, where
for the first item, b3 should be set to NA
For 3PL items, b1 is the difficulty parameter. All other b should be set to NA
g: guessing parameters for 3PL items. Set to NA for GPCM items
ItemID: Item IDs for SA items
AssertionID: Assertion IDs for SA items
***SA_parm columns must follow the above order
