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Fix missing denominator degrees of freedom in lmerTest ANOVA reports #513

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Fix missing denominator degrees of freedom in lmerTest ANOVA reports #513

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Copilot Aug 31, 2025
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Fix missing denominator degrees of freedom in lmerTest ANOVA reports
Copilot Aug 31, 2025
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2 changes: 1 addition & 1 deletion DESCRIPTION
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
Package: report
Type: Package
Title: Automated Reporting of Results and Statistical Models
Version: 0.6.1.2
Version: 0.6.1.3
Authors@R:
c(person(given = "Dominique",
family = "Makowski",
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1 change: 1 addition & 0 deletions NEWS.md
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Expand Up @@ -2,6 +2,7 @@

Bug fixes

* `report.anova()`: fix missing denominator degrees of freedom in lmerTest ANOVA reports (#453)
* Fixed issue with missing effect size for the Intercept term in type 3 anova tables (#451)

# report 0.6.1
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2 changes: 2 additions & 0 deletions R/report.aov.R
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Expand Up @@ -187,6 +187,8 @@ report_statistics.aov <- function(x, table = NULL, ...) {
text <- paste0(text, ", ", insight::format_value(DoF_residual, protect_integers = TRUE))
} else if ("DoF_Residuals" %in% names(parameters)) {
text <- paste0(text, ", ", insight::format_value(parameters$DoF_Residuals, protect_integers = TRUE))
} else if ("df_error" %in% names(parameters)) {
text <- paste0(text, ", ", insight::format_value(parameters$df_error, protect_integers = TRUE))
}

# Indices
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16 changes: 16 additions & 0 deletions tests/testthat/test-report.lmer.R
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Expand Up @@ -21,3 +21,19 @@ test_that("report-lmer", {

expect_snapshot(variant = "windows", report(m2))
})

test_that("report-lmerTest-anova includes denominator df", {
skip_if_not_installed("lmerTest")

# Test case for issue #453: lmerTest ANOVA should include denominator degrees of freedom
m <- lmerTest::lmer(mpg ~ wt + (1 | gear), data = mtcars)
anova_result <- anova(m)
report_output <- report(anova_result)

# The report should include denominator df in F-statistic
# Should be F(1, 21.92) not just F(1)
expect_match(as.character(report_output), "F\\(1, [0-9.]+\\)")

# Should not have the old pattern without denominator df
expect_no_match(as.character(report_output), "F\\(1\\) =")
})