---
title: "Process-measure registry, repeatability, and reliability"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Process-measure registry, repeatability, and reliability}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

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

The process-measure registry separates an observed feature from the construct claims sometimes attached to it. Each registry entry records channel, unit, aggregation level, interpretation, guardrail, and status.

```{r, eval=FALSE}
process_measure_registry()
process_measure_card("pupil_peak")
process_measure_guardrails()
```

Repeatability can then be evaluated independently of construct meaning.

```{r, eval=FALSE}
r <- read.csv(system.file("extdata","reliability_demo.csv", package="eyeprocess"))
process_icc(r, "person_id", "session", "dwell_time")
profile <- process_reliability_profile(r, "person_id", "session", "dwell_time")
plot(profile, type="bland_altman")
```

High repeatability does not by itself establish validity, diagnostic meaning, or person-level interpretability.