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Stocking-Lord characteristic-curve linking

Source: R/086-irt-linking-invariance-0-9.R
eyeprocess_irt_stocking_lord_link.Rd

Stocking-Lord characteristic-curve linking

Usage

eyeprocess_irt_stocking_lord_link(
  reference,
  focal,
  anchors = NULL,
  theta = seq(-4, 4, length.out = 81),
  weights = NULL,
  start = c(A = 1, B = 0)
)

Arguments

reference

Reference-form or reference-group item parameters.

focal

Focal-form or focal-group item parameters.

anchors

Anchor-item identifiers.

theta

Latent-trait value or vector of latent-trait values.

weights

Optional numerical weights.

start

Starting values for numerical optimization.

Value

An object of class "eye_irt_link", stored as a named list, with components "A", "B", "method", "anchors", "objective", "convergence". It contains stocking-Lord characteristic-curve linking and associated metadata or diagnostics needed to interpret the result.