fillCustomLinkagePlan

t.tot

matrix containing all items in the rows and all test forms
in the columns

true.items

matrix containing the number of items each test form has
in common with itself and another test form

linkage.plan

Lower bound for the (uniform) distribution of item
discrimination parameter

min.a

Upper bound for the (uniform) distribution of item
discrimination parameter

max.a

Mean of (normally-distributed) item difficulty parameter

mu.b

Standard deviation of (normally-distributed) item difficulty
parameter

sd.b

Arguments to pass to genItemParameter

Fill matrix of true.items with values from a custom linkage plan

Generates binary test data based on Item Response Theory using the two-parameter logistic model (Lord, 1980 <doi:10.4324/9780203056615>). Useful functions for test equating are included, e.g. functions for generating internal and external common items between test forms and a function to create a linkage plans between those forms. Ancillary functions for generating true item and person parameters as well as for calculating the probability of a person correctly answering an item are also included.

fillCustomLinkagePlan: Fill matrix of true.items with values from a custom linkage plan

Description

Usage

Arguments