---
title: "Unified Multimodal Process-IRT"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Unified Multimodal Process-IRT}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(collapse = TRUE, comment = "#>")
library(eyeprocess)
```

## Objective

`eyeprocess` 0.10 treats response, RT, gaze and pupil as coordinated
measurement channels while retaining neutral interpretation of process signals.

```{r}
sim <- simulate_multimodal_irt(n_person=60, n_item=10, seed=42)
sim
audit_multimodal_measurement(sim$measurement)
```

## Native visualization

```{r}
plot(sim, type="latent_correlation")
plot(sim$measurement, type="availability")
```

## Interpretation boundary

The simulated gaze dimension is a gaze-process propensity and the pupil
dimension is pupil responsivity. Neither is automatically a psychological
construct.