Facilitate Writing Documents in American Psychological Association Style, Seventh Edition

Create American Psychological Association Style, Seventh Edition documents. Format numbers and text consistent with APA style. Create tables that comply with APA style by extending flextable functions.

apa7

The goal of apa7 is to facilitate writing documents in APA Style (7th Edition).

Installation

To install the published version from CRAN:

install.packages("apa7")

You can install the development version of apa7 with:

install.packages("apa7", repos = c('https://wjschne.r-universe.dev'))

Tables

The package provides functions to create APA-style tables, including correlation matrices and regression tables. The tables can be formatted using the flextable package.

library(apa7)
# Correlation matrix 
apa_cor(trees, star_significant = TRUE)

# Make regression model, format parameters, and display flextable
lm(Volume ~ Girth + Height, data = trees) |> 
  apa_parameters() |> 
  apa_flextable()

# Contingency table with chi-square test of independence
d <- mtcars[, c("am", "gear")]
colnames(d) <- c("Transmission", "Gears")
d$Transmission <- factor(d$Transmission, 
                         levels = c(0, 1), 
                         labels = c("Automatic", "Manual"))
apa_chisq(d)

Formatting functions

The package provides functions to format p-values, numbers, and other statistical results according to APA Style.

# Format p-values
apa_p(c(0.0007, 0.001, 0.0081, 0.024, 0.454))
#> [1] "<.001" ".001"  ".008"  ".02"   ".45"