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M4 extends the M3 response + response-time + gaze + pupil measurement backbone with a sequential latent response-process state. The state is a statistical configuration of process measurements, not a psychological construct.
sim <- simulate_multimodal_m4(n_person = 30, n_item = 8, seed = 20260820)
spec <- multimodal_m4_spec(n_states = 2, trait_conditioning = c("theta", "tau"))
print(spec)
#> <eye_multimodal_m4_spec>
#> model: M4 response + RT + gaze + pupil + latent process state
#> states: 2
#> state channels: rt, gaze, pupil
#> transition structure: markov
#> trait conditioning: theta, tau
#> identification: ordered_rt_effect
#> boundary: scored-response ability equation is state-independent
#> interpretation: statistical response-process states; no psychological label impliedThe reference scored-response model remains state-independent. States shift RT, gaze, and pupil process channels only, and posterior state probabilities are the primary inferential object.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.