TestDesign (version 1.0.2)

item_2PL-class: An S4 class to represent a 2PL item

Description

An S4 class to represent a 2PL item.

Slots

slope

Numeric. A slope parameter value.

difficulty

Numeric. A difficulty parameter value.

References

lord_theory_1952TestDesign

birnbaum_efficient_1957TestDesign

birnbaum_estimation_1958TestDesign

birnbaum_further_1958TestDesign

Examples

# NOT RUN {
item_2 <- new("item_2PL", slope = 1.0, difficulty = 0.5)
# }