M3 response + RT + gaze + pupil specification — multimodal_m3

Extends the established eyeprocess multimodal IRT specification with a continuous pupil-responsivity channel. The summary representation is fitted by the bundled four-channel Stan model. `functional_score` records that the pupil input was derived from a trajectory/functional workflow; it does not silently turn the scalar reference likelihood into a functional likelihood.

Usage

multimodal_m3_spec(
  backend = "cmdstanr",
  prior_profile = c("regularized", "paper_centered"),
  missingness = "ignorable",
  pupil_representation = c("summary", "functional_score"),
  nuisance = stats::setNames(rep(TRUE, 8L), .ep10_m3_nuisance_names)
)

Arguments

backend: Currently `"cmdstanr"` only.
prior_profile: Prior profile.
missingness: Currently `"ignorable"` only.
pupil_representation: `"summary"` or `"functional_score"`.
nuisance: Named logical vector selecting baseline, luminance, gaze X/Y, quality, blink, interpolation and time-on-task nuisance terms. Availability is also audited from data.

Value

An `eye_multimodal_m3_spec` inheriting the established multimodal and IRT spec classes.