Package: pecanr
Title: Partial Eta-Squared for Crossed, Nested, and Mixed Linear Mixed
        Models
Version: 0.3.1
Authors@R: c(
    person("Brandon", "Cohen", email = "brandon.cohen-1@colorado.edu",
           role = c("aut", "cre"),
           comment = c(ORCID = "0009-0004-1802-3435")),
    person("Joshua", "Correll", email = "joshua.correll@colorado.edu",
           role = c("aut", "ths"),
           comment = c(ORCID = "0000-0003-1142-459X")))
Description: Computes partial eta-squared effect sizes for fixed effects in
    linear mixed models fitted with the 'lme4' package. Supports crossed,
    nested, and mixed (crossed-and-nested) random effects structures with any
    number of grouping factors. Mixed designs handle cases where grouping
    factors are simultaneously crossed with some variables and nested within
    others (e.g., photos nested within models, but both crossed with
    participants). Factor predictors are supported directly, and a single
    factor-level (omnibus) effect size can be obtained for a multi-level factor
    or multi-df interaction. Random slope variances are translated to the
    outcome scale using a variance decomposition approach, correctly accounting
    for predictor scaling and interaction terms. Both general and operative
    effect sizes are provided, with optional parametric bootstrap confidence
    intervals. For correlated predictors, per-predictor effect sizes use unique
    (semipartial) variance by default. Methods are based on Correll, Mellinger, McClelland, and Judd
    (2020) <doi:10.1016/j.tics.2019.12.009>, Correll, Mellinger, and Pedersen
    (2022) <doi:10.3758/s13428-021-01687-2>, and Rights and Sterba (2019)
    <doi:10.1037/met0000184>.
License: MIT + file LICENSE
URL: https://github.com/bcohen0901/pecanr
BugReports: https://github.com/bcohen0901/pecanr/issues
Encoding: UTF-8
Imports: lme4, stats
Suggests: spelling, testthat (>= 3.0.0)
Config/testthat/edition: 3
Language: en-US
Config/roxygen2/version: 8.0.0
NeedsCompilation: no
Packaged: 2026-07-08 21:03:41 UTC; brandoncohen
Author: Brandon Cohen [aut, cre] (ORCID:
    <https://orcid.org/0009-0004-1802-3435>),
  Joshua Correll [aut, ths] (ORCID:
    <https://orcid.org/0000-0003-1142-459X>)
Maintainer: Brandon Cohen <brandon.cohen-1@colorado.edu>
Repository: CRAN
Date/Publication: 2026-07-09 17:30:07 UTC
