Format t-test results in APA style

Format t-test results in APA style

Usage

# S3 method for class 'htest'
apa(obj, show.mean = FALSE, abs = FALSE, ...)

Arguments

obj

An object from stats::t.test

show.mean

Include mean value in results (useful for one-sample test)

abs

Show the absolute value of t-statistic

...

Other arguments passed to format_results

Value

A string with t-test value, degrees of freedom, p-value, and optionally the mean with CI

Examples

# One-sample t-test
t_res <- t.test(rnorm(20, mean = -10, sd = 2))
apa(t_res)
#> [1] "_t_(19.0) = -22.02, _p_ < .001"
apa(t_res, show.mean = TRUE)
#> [1] "_M_ = -9.69 [-10.61, -8.76], _t_(19.0) = -22.02, _p_ < .001"

# Two-sample t-test
t_two <- t.test(rnorm(20), rnorm(20, mean = 0.8))
apa(t_two)
#> [1] "_t_(37.9) = -3.55, _p_ = .001"