Research

My research interests span a range of topics within linguistics, although the main focus is on the study of speech sounds, and in particular speech production, from a variety of intersecting perspectives, including:

The other strand of my research expertise is related to research methods and statistics. In particular, I am an enthusiastic advocate of Open Research (aka Open Science) and Bayesian inference.

For an overview of the research meta-models that inform my research, see the Meta page. The following sections list current and past project by research area.

Phonetology

NoteIntrinsic vowel duration and gestural distance

Intrinsic vowel duration is the tendency for high vowels to be shorter and low vowels to be longer. In this project I will investigate if articulator origin-to-target distance is sufficient to explain vowel duration or if vowels include category-specific durational targets.

submitted Is 'intrinsic vowel duration' bio-mechanical or more? Preliminary results from Northwestern Italian
Stefano Coretta
Language and Speech
No matching items
NoteHemispheric differences in specificity effects of priming

Project with Jeremy Steffman looking at how auditory priming effects are modulated depending on which hemisphere processes the speech signal.

Past projects

The Many Speech Analyses project (with Timo Roettger and Joseph V. Casillas) set out to quantify the analytic flexibility in the speech sciences and explored how it affects our scientific conclusions. To that end, we asked speech researchers to analyse the same data set in order to answer the same research question.

2023 Multidimensional signals and analytic flexibility: Estimating degrees of freedom in human speech analyses
Stefano Coretta, Joseph V. Casillas, …, Timo Roettger
Advances in Methods and Practices in Psychological Science 6(3)

No matching items

In collaboration with Lejda Kapia, Josianne Riverin-Coutlée, and Stephen Nichols, we have investigate the sound system of Albanian.

2023 Northern Tosk Albanian (IPA Illustration)
Stefano Coretta, Josiane Riverin-Cutlée, Enkeleida Kapia, Stephen Nichols
Journal of the International Phonetic Association 53(3). 1122–1144

No matching items

I worked within the ERC project Human interaction and the evolution of spoken accent (PI Prof. Jonathan Harrington) at the Institut für Phonetik und Sprachverarbeitung. This project employs real-time MRI data to investigate, among other things, how articulatory aspects of speech can pave the way for sound change.

2021 Planting the seed for sound change: Evidence from real-time MRI of velum kinematics in German
Chris Carignan, Stefano Coretta, Jans Frahm, Jonathan Harrington, Phil Hoole, Arun Joseph, Esther Kunay, Dirk Voit
Language 97(2), 333–364

No matching items

I conducted research within the DFG project Nasal coarticulation and sound-change: a real-time MRI study (PI Prof. Jonathan Harrington).

As part of my PhD research at the University of Manchester, supervised by Dr Ricardo Bermúdez-Otero and Dr Patrycja Strycharczuk), I investigated the effect of consonant voicing on vowel duration, using a combination of acoustic analyses, ultrasound tongue imaging and electroglottography. My thesis is available here.

2020 Longer vowel duration correlates with greater tongue root advancement at vowel offset: Acoustic and articulatory data from Italian and Polish
Stefano Coretta
Journal of the Acoustical Society of America 147, 245–259

2020 An exploratory study of voicing-related differences in vowel duration as compensatory temporal adjustment in Italian and Polish
Stefano Coretta
Glossa: a journal of general linguistics 4(1) 125, 1–25

No matching items

“At the margins”

These projects cover marginalised/minoritised languages, communities, knowledge systems and ecologies.

NoteLanguage and biological diversity

This project with Jessica Hampton focusses on the relationship of linguistic and biological diversity. The project will be developed in three phases:

  • Phase 1: Assessing the link between language endangerment and biodiversity intactness.

  • Phase 2: Developing an index of linguistic diversity intactness.

  • Phase 3: Assessing the link between linguistic and biological diversity intactness.

NoteBeyond

As part of this project with Jessica Hampton, we set out to write a triptych of papers united by the idea of going “beyond” current practices and dichotomies.

  • Paper 1: Beyond sociolinguistics (on the constructivist/structuralist dichotomy).

  • Paper 2: Beyond the quantitative/qualitative dichotomy.

  • Paper 3: TBD

NoteVitality of Gallo-Romance of Northern Italy

In this project with Jessica Hampton and Simone De Cia, we are conducting a survey study of the vitality of Gallo-Romance in the north of Italy.

Past projects

This project with Jessica Hampton investigated the relationship between language attitudes and competence in the communities of Emilian and Esperanto speakers. We find that the relationship is modulated by spaces of use: at lower proportions of spaces of use, language attitudes are more positively correlated with language competence, while at higher proportions of spaces of use, the relationship between attitude and competence is reduced. We propose that creating spaces for users of minoritised languages like Emilian could engender higher levels of language competence and hence language maintenance.

2024 Language practices of Emilian and Esperanto communities: spaces of use, explicit language attitudes and self-reported competence
Jessica Hampton, Stefano Coretta
Journal of Multilingual and Multicultural Development

No matching items

Research methods

NoteStatistics for linguistics

This is a long-term project about writing conceptual papers and practical tutorials on various statistical topics in linguistics.

List
submitted Multivariate analyses of tongue contours from ultrasound tongue imaging
Stefano Coretta, Georges Sakr
Language and Speech
submitted Bayesian beta regressions with brms in R: A tutorial for phoneticians
Stefano Coretta, Paul-Christian Bürkner
Journal of Phonetics
2024 A tutorial on Generalised Additive Mixed Effects Models for bilingualism research
Stefano Coretta, Joseph V. Casillas
Linguistic Approaches to Bilingualism

2023 Multidimensional signals and analytic flexibility: Estimating degrees of freedom in human speech analyses
Stefano Coretta, Joseph V. Casillas, …, Timo Roettger
Advances in Methods and Practices in Psychological Science 6(3)

No matching items
NoteR package development

As part of my ongoing work towards improving quantitative methods in linguistics, I develop and maintain a series of R packages.

List
2025 phonetisr: A Naive IPA Tokeniser
Stefano Coretta
R package v0.1.0

2025 rticulate: Ultrasound Tongue Imaging in R
Stefano Coretta
R package v2.0.1

2024 tidygam: Tidy Prediction and Plotting of Generalised Additive Models
Stefano Coretta
R package v1.0.0

2024 speakr: A Wrapper for the Phonetic Software Praat
Stefano Coretta
R package v3.2.4

No matching items

Statistical collaborations

Principal Investigators: Patrycja Strycharczuk, Małgorzata Ćavar. Work on stress-related vowel reduction in Polish: is vowel reduction in unstressed syllables the direct consequence of temporal reduction or temporal reduction alone is insufficient to explain the articulatory/spectral reduction?

2021 Distance vs. time: Acoustic and articulatory consequences of reduced vowel duration in Polish
Patrycja Strycharczuk, Małgorzata Ćavar, Stefano Coretta
Journal of the Acoustical Society of America 150(1), 592–607

No matching items
2025 V2-Relatives in Old English
Bettelou Los, Stefano Coretta
Discourse structure and narration. A diachronic view from Germanic Ch 9, pp. 305-341. Eds Ulrike Demske and Barthe Bloom
2023 The decline of local anchoring: A quantitative investigation
Bettelou Los, Dreschler Gea, Ans van Kemenade, Erwin Komen, Stefano Coretta
English Language & Linguistics 27(2). 345–372

No matching items

Project Team: Chen Zhao, Ludovica Serratrice and Thea Cameron-Faulkner (Lead). Website.

I developed the statistical analysis for the package Investigating prelinguistic development in three minority cultures.

2020 A cross cultural analysis of early prelinguistic gesture development and its relationship to language development
Thea Cameron-Faulkner, Nivedita Malik, Circle Steele, Stefano Coretta, Ludovica Serratrice, Elena Lieven
Child Development 92, 273–290

No matching items

Glossolects


The map shows in blue the main glossolects I work(ed) with, and in red glossolects I have studied during my time at University and forgotten to different degrees (approximate locations).

Overall, my interests and expertise cover the following macro-glossolects:

  • Indo-European.
  • Oceanic.
  • South American.

I would very much welcome offers of collaboration on glossolects from other areas of the world, especially from Africa and Asia, which are alas the ones I am the least familiar with.