interactionModel function

Interaction model

Estimates the parameters of the interaction model. The plots can be produced with the appropriate plotting method.

interactionModel(x, eps = 0.1, rasch = FALSE)

Arguments

• x: A matrix of responses: persons as rows, items as columns, entries are either 0 or 1, no missing data
• eps: Convergence criterion, default is 1e-1
• rasch: if TRUE, the Rasch model will be estimated instead.

Returns

A matrix

References

Shelby Haberman. The interaction model. Chapter in: Mathias von Davier & Claus H. Carstensen (Eds.) (2007). Multivariate and Mixture Distribution Rasch Models. New York:Springer

Author(s)

Ivailo Partchev, using C code and theory by Gunter Maris