fit_gpirt: GPIRT model-criticism interface

In eyeprocess: Harmonize Eye-Tracking, Pupillometry, Biometrics, and Psychometric Process Data

GPIRT model-criticism interface

Description

'external' is the only exact GPIRT path. 'spline_reference' fits flexible logistic spline IRFs solely as a nonparametric stress test for conventional logistic IRF shape; it is deliberately not described as a Gaussian process.

Usage

fit_gpirt(
  response_matrix,
  engine = c("spline_reference", "external"),
  external_engine = NULL,
  spline_df = 5L,
  ...
)

Arguments

response_matrix	Person-by-item response matrix.
engine	Estimation engine.
external_engine	Validated external fitting function.
spline_df	Degrees of freedom for the spline reference model.
...	Additional arguments passed to the selected model, engine, or method.

Value

An object of class "eye_gpirt", stored as a named list, with components "response_matrix", "models", "theta_proxy", "engine", "exact_gpirt", "status", "note". It contains gPIRT model-criticism interface and associated metadata or diagnostics needed to interpret the result.

eyeprocess documentation built on Sept. 28, 2026, 5:08 p.m.