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IRTpp (version 0.2.6.1)
parameters.initialize: parameters.initialize
Description
Function to initialize model parameters
Usage
parameters.initialize(dataset, model, dims, method = "DEFAULT", red.items = T)
Arguments
dataset
The dataset to calculate the initial parameters. A matrix of 0's and 1's
model
The model with dimensions.
dims
To set the dimensions of use in the test.
method
Optional, "PCA" for multidimensional and "ANDRADE" for unidimensional are the current implementations.
red.items
Optional, default true. Reduces the dataset to the dataset without trash items.s
Value
Initial values for a estimation on the dataset and the model.
References
Andrade, D. F. , Tavares, H. R. y Valle, R. C. (2000). Teoria da resposta ao Item : Conceitos e Aplicacoes. SINAPE : Caxambu, MG