skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: Prosodic variability in marking remote past in African American English
This paper explores variability in the fundamental frequency (f0) of utterances containing the remote past marker BIN in African American English, which has been described as having higher f0, intensity and duration relative to preceding material, and reduced f0 following, though with some interspeaker variability (Green et al. 2022). Here we re-analyze data from Green et al. (2022) to characterize the space of possible phonetic realizations of BIN utterances. We computed the 90th percentile f0 value in pre-/on-/post-BIN regions to create a 3-point "topline" f0 shape profile of the utterance (Cooper & Sorensen 1981) and performed time series clustering and principal components analysis (PCA). Two clusters were identified, one with higher f0 on BIN and lower f0 post-BIN, and one with lower f0 on BIN and higher f0 post-BIN. Results from PCA indicate speakers vary along two dimensions: one relating to pre-BIN f0 and one to post-BIN f0. Both dimensions were tied to f0 height on BIN, demonstrating the role that global aspects of the contour play in the variability. We show how the topline representation of f0 contour shape is robust to missing values and uncontrolled sentences and thus useful for naturalistic speech.  more » « less
Award ID(s):
2042939
PAR ID:
10578842
Author(s) / Creator(s):
;
Publisher / Repository:
ISCA
Date Published:
ISSN:
2333-2042
Page Range / eLocation ID:
1065 to 1069
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. This paper jointly considers syntactic, semantic, and phonological/phonetic factors in approaching an understanding of BIN, a remote past marker in African American English that has been described as “stressed.” It brings together data from the Corpus of Regional African American Language (CORAAL) and a production study in a small African American English-speaking community in southwest Louisiana to investigate the use and phonetic realization of BIN constructions. Only 20 instances of BIN constructions were found in CORAAL. This sparsity was not simply due to a dearth of semantic contexts for BIN in the interviews, since 122 instances of semantically equivalent been + temporal adverbial variants were also found. These results raise questions about the extent to which BIN constructions and been + temporal adverbial variants are used in different pragmatic and discourse contexts as well as in different speech styles. The production study elicited BIN and past participle been constructions in controlled syntactic and semantic environments. The phonetic realization of BIN was found to be distributed over the entire utterance rather than localized to BIN. BIN utterances were distinguished from past participle been utterances by having higher ratios of fundamental frequency (F0), intensity, and duration in BIN/ been relative to preceding and following material in the utterance. In both studies, BIN utterances were generally realized with a high F0 peak on BIN and a reduced F0 range in the post- BIN region, with variability in the presence and kinds of F0 movements utterance-initially and utterance-finally, as well as in F0 downtrends in the post- BIN region. 
    more » « less
  2. The Texas A&M University System (TAMUS) Louis Stokes Alliance for Minority Participation (LSAMP) supported two forms of international research experiences for undergraduates in the summer of 2022. A total of 29 students, 82.3% of whom identified with underrepresented groups, participated in either a ten-day program in the Yucatan, Texas A&M University’s College of Engineering Introduction to Research Abroad (IRAP), or a two-week intensive course in Belize, Texas A&M University – Corpus Christi’s Ridges to Reefs program (R2R). The first offered an introduction to research in collaboration with universities in the Yucatan while the second considered ecology of river and coral reef systems in Belize with programming offered on land and at the Mesoamerican Coral Reef. Pre- and post-participation surveys regarding prior experience, research skills, a variety of potential impacts, graduate school, and learning were conducted with participants. Comparison of the pre- and post-participation submissions indicated participants found the offerings valuable for learning about concepts related to their major and specific topics in the sciences, learning about research, themselves, history and culture, refining education and career plans, developing confidence in personal ability, expanding conceptions of research, science and culture while increasing openness to employment outside the United States, and ability to relate to peers and professional scientists. These outcomes were present for both cohorts, IRAP and R2R, with some instances of statistically significant increases pre- to post-participation despite the small counts of participants (IRAP = 18, R2R = 11). Several of the outcomes parallel findings from prior support of international research experiences by TAMUS LSAMP (Preuss et al, 2020; Preuss, et al, 2021; Preuss et al, 2022). The survey findings from summer 2022 are presented as an initial data set that, while requiring verification through replication of programming in 2023 and beyond, point to the efficacy of short-term international research opportunities as learning, perspective altering, and motivating experiences for undergraduates who identify with underrepresented groups and for undergraduates in general. 
    more » « less
  3. This study investigates whether short-term perceptual training can enhance Seoul-Korean listeners’ use of English lexical stress in spoken word recognition. Unlike English, Seoul Korean does not have lexical stress (or lexical pitch accents/tones). Seoul-Korean speakers at a high-intermediate English proficiency completed a visual-world eye-tracking experiment adapted from Connell et al. (2018) (pre-/post-test). The experiment tested whether pitch in the target stimulus (accented versus unaccented first syllable) and vowel quality in the lexical competitor (reduced versus full first vowel) modulated fixations to the target word (e.g., PARrot; ARson) over the competitor word (e.g., paRADE or PARish; arCHIVE or ARcade). In the training (eight 30-min sessions over eight days), participants heard English lexical-stress minimal pairs uttered by four talkers (high variability) or one talker (low variability), categorized them as noun (first-syllable stress) or verb (second-syllable stress), and received accuracy feedback. The results showed that neither training increased target-over-competitor fixation proportions. Crucially, the same training had been found to improve Seoul- Korean listeners’ recall of English words differing in lexical stress (Tremblay et al., 2022) and their weighting of acoustic cues to English lexical stress (Tremblay et al., 2023). These results suggest that short-term perceptual training has a limited effect on target-over-competitor word activation. 
    more » « less
  4. Period-doubled voice consists of two alternating periods with multiple frequencies and is often perceived as rough with an indeterminate pitch. Past pitch-matching studies in period-doubled voice found that the perceived pitch was lower as the degree of amplitude and frequency modulation between the two alternating periods increased. The perceptual outcome also differed across f0s and modulation types: a lower f0 prompted earlier identification of a lower pitch, and the matched pitch dropped more quickly in frequency- than amplitude-modulated tokens (Sun & Xu, 2002; Bergan & Titze, 2001). However, it is unclear how listeners perceive period doubling when identifying linguistic tones. In an artificial language learning paradigm, this study used resynthesized stimuli with alternating amplitudes and/or frequencies of varying degrees, based on a production study of period-doubled voice (Huang, 2022). Listeners were native speakers of English and Mandarin. We confirm the positive relationship between the modulation degree and the proportion of low tones heard, and find that frequency modulation biased listeners to choose more low-tone options than amplitude modulation. However, a higher f0 (300 Hz) leads to a low-tone percept in more amplitude-modulated tokens than a lower f0 (200 Hz). Both English and Mandarin listeners behaved similarly, suggesting that pitch perception during period doubling is not language-specific. Furthermore, period doubling is predicted to signal low tones in languages, even when the f0 is high. 
    more » « less
  5. Santhanam, Rahul (Ed.)
    The recent breakthrough of Limaye, Srinivasan and Tavenas [Limaye et al., 2022] (LST) gave the first super-polynomial lower bounds against low-depth algebraic circuits, for any field of zero (or sufficiently large) characteristic. It was an open question to extend this result to small-characteristic ([Limaye et al., 2022; Govindasamy et al., 2022; Fournier et al., 2023]), which in particular is relevant for an approach to prove superpolynomial AC⁰[p]-Frege lower bounds ([Govindasamy et al., 2022]). In this work, we prove super-polynomial algebraic circuit lower bounds against low-depth algebraic circuits over any field, with the same parameters as LST (or even matching the improved parameters of Bhargav, Dutta, and Saxena [Bhargav et al., 2022]). We give two proofs. The first is logical, showing that even though the proof of LST naively fails in small characteristic, the proof is sufficiently algebraic that generic transfer results imply the result over characteristic zero implies the result over all fields. Motivated by this indirect proof, we then proceed to give a second constructive proof, replacing the field-dependent set-multilinearization result of LST with a set-multilinearization that works over any field, by using the Binet-Minc identity [Minc, 1979]. 
    more » « less