vot: Combined VOT production data
In kleinschmidt/votcorpora: VOT production data from various sources

Word initial VOT measurements from four different production experiments. Two are isolated word reading, one is sentence reading, and one is conversational speech from interviews.

vot

A data frame with 14,262 observations of 12 variables:

source: The source of this observation
subject: ID of the talker that produced this observation
phoneme: Phoneme whose VOT was measured
final_phoneme: Final phoneme in the word (allen-miller only; all voiced/voiceless stops)
vot: Voice onset time in ms
vowel_duration: Duration of the following vowel in ms
final_closure: Closure duration of final stop (allen-miller only).
final_aspiration: Duration of release burst of final stop (allen-miller only).
prevoiced: For voiced stops, TRUE if prevoicing was present, FALSE if not. NA for voiceless stops
word: Word that the phoneme occurred in
sex: The sex of the talker ('m' or 'f'), NA if missing (bbg09).
age: The age of the talker, NA if missing (bbg09 and gva13).
age_group: The age group of the talker ('o' for over 40, and 'y' for under 30; based on the Buckeye Corpus scheme).
bilingual: TRUE for French-English bilinguals, FALSE for english monolinguals
speech_rate: The local speech rate (for Buckeye only) in syllables per second. This is calculated based on the number of vowels in the continuous speech window around the word where VOT was extracted.
speech_rate_condition: Allen & Miller (1999) elicited slow and fast speech rates in their Experiment 2 by varying the instructions and the time that the word was displayed (1500ms for the "slow" rate, and 750ms for the "fast" rate)

.

stop_length: The length of the whole stop, from burst to following sonorant onset (Buckeye only), in ms.
voicing: Is the phoneme voiced or voiceless.
place: Place of articulation. cor for coronal, lab for labial, and dor for dorsal.

The sources are

bbg09: Baese-Berk & Goldrick (2009), experiment 1 measured voice onset time for monosyllabic words with word-initial voiceless stops. Some words had voiced minimal pair, while others did not. Words were read in isolation with other monosyllabic fillers that did not have initial stops. Experiment 1a only had /p/-initial words, and Experiment 1b had /t/ and /k/.
gva13: Goldrick, Vaughn, & Murphy (2013), experiment 1 is analogous to bbg09 but with voiced stops.
allen-miller: Allen & Miller (1999). Experiment 1 was similar to gva13 and measured VOTs for voiced and voiceless stops in monosyllabic words from . Experiment 2 was the same as Experiment 1 but included the additional manipulation of speaking rate (fast and slow). Prevoiced stops are coded as NA. Since all words were monosyllabic with a final stop consonant, the stop consonant phoneme is included (final_phoneme), as is the measurements of closure and aspiration duration (final_closure and final_aspiration).
levari-sent: Lev-Ari, S., & Peperkamp, S. (2013). English-French bilinguals (English L1) read 16 sentences, 10 of which contained one word each starting with /p/, /t/, and /k/. (Items are the English sentences from Fowler, Sramkoc, Ostrya, Rowlanda, & Halle, 2008)
levari-convo: A subset of the talkers from levari-sent conducted interviews, from which VOTs of all word-initial voiceless stops were measured.
buckeye: Nelson, Noah & Wedel, Andrew (under revision). The phonetic specificity of competition: Contrastive hyperarticulation of voice onset time in conversational English. VOTs manually extracted from the Buckeye Corpus of conversational speech by Andy Wedel. Age is coded as old (40+) or young (under 40). Includes two measures of local speech rate, syllables per second and total stop length.