TestDesign (version 1.0.2)

info_3pl: Calculate Fisher information at a single theta (3PL)

Description

Calculate the Fisher information at a theta value according to the 3PL model.

Usage

info_3pl(x, a, b, c)

Arguments

x

Numeric. A single theta value.

a

Numeric. A slope parameter value.

b

Numeric. A difficulty parameter value.

c

Numeric. A guessing parameter value.

References

birnbaum_latent_1968TestDesign