Delta C & Delta V

This function loads a dataframe as input and returns a dataframe containing the mean values and mean standard deviations of Delta C and Delta V.

Usage

delta_cv(df, cv_label, utterance_id, cv_duration)

Arguments

df

a data frame containing cv_labels, utterance_id, and cv_duration values.

cv_label

the column name for whether a segment is a C(onsonant) or a V(owel)

utterance_id

the column name where each unique utterance has a unique id

cv_duration

the column name for the duration of C or V

Value

a data frame containing the results of Delta C and Delta V values

Details

Delta C and Delta V are rhythm metrics based on Ramus, F., Nespor, M., & Mehler, J. (1999). Correlates of linguistic rhythm in the speech signal. Cognition, 73(3), 265-292.

Delta C: SD of total C duration Delta V: SD of total V duration

Author

Cong Zhang, cong.zhang@newcastle.ac.uk

Examples

df_test <- data.frame(cv_label  = c("c", "v", "c", "v","c", "v", "c", "v"),
                      utterance_id = c("utt_1", "utt_1", "utt_2", "utt_2",
                                       "utt_1", "utt_1", "utt_2", "utt_2"),
                      cv_duration = c(0.1, 0.8, 0.2, 0.5, 0.3, 0.3, 0.4, 0.7))

delta_cv(df_test, cv_label, utterance_id, cv_duration)
#> # A tibble: 2 × 3
#>   cv_label mean_delta sd_delta
#>   <chr>         <dbl>    <dbl>
#> 1 c             0.141 2.78e-17
#> 2 v             0.247 1.5 e- 1