Package: scindex
Title: Strategic Convergence Index for Inter-Rater Reliability
Version: 0.1.0
Authors@R: 
    person(
      given = "Irene",
      family = "Gianeselli",
      role = c("aut", "cre"),
      email = "irene.gianeselli@unibz.it",
      comment = c(ORCID = "https://orcid.org/0000-0002-8689-3035")
    )
Description: 
    Inter-rater reliability analysis for binary classification
    tasks involving two or more raters within a signal
    detection-theoretic framework. User-supplied rating data are
    standardised into a common long-format structure. The package
    automatically computes Cohen's kappa for two raters and
    Fleiss' kappa for multiple raters. When ground-truth labels
    are available, rater-specific hit rates, false-alarm rates,
    sensitivity, specificity, and decision thresholds are
    estimated from observed classification responses using
    standard signal detection-theoretic transformations
    (DeCarlo, 1998)
    <doi:10.1037/1082-989X.3.2.186>. The package implements the
    Strategic Convergence Index (SCI; Gianeselli, 2026)
    <doi:10.1177/00131644261417643>, defined as
    SCI = 1 - [Var(t_i) / Var_max], where Var(t_i) denotes the
    variance of rater-specific decision thresholds and Var_max
    denotes the reference variance under maximal threshold
    dispersion. SCI quantifies convergence in rater decision
    criteria beyond observed agreement alone and complements
    classical agreement coefficients by distinguishing agreement
    in observed categorical outcomes from convergence in latent
    decision thresholds under an explicit signal
    detection-theoretic model of categorical judgment. The
    package provides structured summaries and threshold-based
    diagnostics for applications in which similar agreement
    coefficients may reflect substantively different underlying
    decision criteria across raters.
License: GPL-3
Encoding: UTF-8
RoxygenNote: 7.3.3
Depends: R (>= 4.1.0)
Imports: stats
Suggests: testthat (>= 3.0.0), knitr, rmarkdown
Config/testthat/edition: 3
LazyData: true
NeedsCompilation: no
Packaged: 2026-05-18 13:05:50 UTC; irene
Author: Irene Gianeselli [aut, cre] (ORCID:
    <https://orcid.org/0000-0002-8689-3035>)
Maintainer: Irene Gianeselli <irene.gianeselli@unibz.it>
Repository: CRAN
Date/Publication: 2026-05-21 13:40:02 UTC
Built: R 4.5.2; ; 2026-05-22 05:38:59 UTC; unix
