TestDesign (version 1.0.2)

p_3pl: Calculate probability at a single theta (3PL)

Description

Calculate the probability of correct response at a theta value, under the 3PL model.

Usage

p_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