This data set is a preprocessed version of the data
provided by Winter and Grawunder (2012). It includes measurements
of voice pitch of Korean speakers in a 2 x 2 factorial design, with
factors gender (male or female) and context (informal or polite).
Format
A data frame with 83 rows and 5 variables:
- subject
A unique identifier for each participant.
- gender
An indicator of the participants gender (only binary).
- sentence
An indicator of the sentence spoken by the participant.
- context
The main manipulation of whether the context was a polite or informal setting.
- pitch
The measured voice pitch in Hz (presumably: average over the sentence spoken).
Source
Winter, B., Grawunder, S. (2012). The phonetic profile of Korean formality. Journal of Phonetics, 40, 808-815.
Examples
if (FALSE) {
# fit a linear model using 'brms'
# regress pitch as a function of dummy-coded factors 'gender' and 'context'
fit <- brms::brm(pitch ~ gender + context, data = politeness)
# check encoding scheme used in the model
get_cell_definitions(fit)
# get draws for male speakers in informal contexts
extract_cell_draws(fit, gender == "M" & context == "inf")
# compare main effects of gender
compare_groups(fit, gender == "F", gender == "M")
}