Matthew Carlson
Associate Professor of Spanish and Linguistics
Director of Graduate Studies
- 244 Burrowes Building
Biography
I am Associate Professor of Spanish and Linguistics. I seek to understand how two or more languages are tightly integrated in the minds of multilinguals, yet multilinguals easily separate or mix them as needed in everyday language use. My approach is broadly emergentist, meaning that I study how linguistic patterns (or grammar) emerges gradually from experience via general cognitive and learning mechanisms, but I am keenly interested in the nature of abstract linguistic representations in the mind, which has led to collaborations with linguists working from a more formalist perspective (e.g., Natvig et al., 2025; Carlson et al., 2021). I draw on work in both linguistics and psycholinguistics, with special attention to methodology in quantitative modeling, experimental design, and statistical analysis. In my research and teaching I focus on languages’ sound systems and on word formation, and I regularly teach undergraduate and graduate courses on phonetics, phonology, and the mental lexicon. I also teach undergraduate courses on variation in Spanish, and on the attitudes (positive and negative) associated with variation, and graduate courses on theories of multilingualism and on statistical methods in language science.
To understand the simultaneous integration and distinctness of languages in the multilingual mind I focus on the interplay between low-level detail (such as acoustic detail in speech or holistic representations of complex words) and the abstract patterns that emerge from language experience and enable language users to recognize related linguistic material even when it seems different on the surface, or to distinguish structures even if they seem the same on the surface. As a concrete example, bilinguals sometimes seem to perceive an “extra” sound when hearing a sequence that does not occur in one of their languages, but they can learn to adjust their perception depending on which language they are listening to (Carlson, 2019). Recently, we have been studying how second language users can know that a certain sound exists in their second language, and exhibit sensitivity to the subtle acoustic detail needed for identifying that sound, but still not identify or distinguish that sound consistently when listening to speech (Carlson, Alkhunaizi, & Holdren, 2025). Bilingual speech perception thus depends not only on sensitivity to acoustic detail, but on the abstract organization of sound categories across distinct languages. A similar interplay between lower-level and more abstract structure can help explain knowledge of word structure and how this enables language users to learn and create new words (Carlson & Gerfen, 2011; Carlson & Crosson, 2024, Carlson, DiMercurio, Gertel, Diaz, & Sandberg, 2025).
Websites
Research Interests
Phonetics, phonology, morphology, the mental lexicon, bilingualism, second language acquisition, speech perception, code switching
Recent Publications
- Natvig, D., Pretorius, E., Putnam, M. T., & Carlson, M. T. (2025). A spanning approach to bilingual representations: Initial explorations. In Page, B. R. & Putnam, M. T. (Eds.) Varieties of German in Contact Settings: Studies in honor of William D. Keel (pp. 238-274). John Benjamins.
- Carlson, M. T., DiMercurio, I. I., Gertel, V. H., Diaz, M. T., Sandberg, C. W. (2025). Canvassing the whole neighborhood: A large-scale view of neighbor network structure, and how it relates to lexical processing. Glossa Psycholinguistics, 4(1).
- Carlson, M. T. & Crosson, A. C. (2024). The Synchronic Status of Historical Bound Roots in the Mental Lexicon: A Dynamic, Psychocentric Perspective. The Mental Lexicon. https://doi.org/10.1075/ml.24032.car
- Cohen, C. & Carlson, M. T. (2024). Shifting between storage and computation in lexical retrieval: Evidence from pronunciation variation. In M. Schlechtweg (Ed.). Interfaces of Phonetics. (pp. 155-204). Berlin: DeGruyter.
- Carlson, M. T., Fábregas, A., & Putnam, M. T. (2021) How Wide the Divide? – Theorizing ‘Constructions’ in Generative and Usage-Based Frameworks. Frontiers in Psychology 12. https://doi.org/10.3389/fpsyg.2021.601303.
- López-Beltrán, P., & Carlson, M. T. (2020). How Usage-Based Approaches to Language Can Contribute to a Unified Theory of Heritage Grammars. Linguistics Vanguard 6(1). https://doi.org/10.1515/lingvan-2019-0072.
- Carlson, M. T. & McAllister, A. (2019). I’ve heard that one before: Phonetic reduction in speech production as a possible contributing factor in perceptual illusory vowel effects. Studies in Hispanic and Lusophone Linguistics 12(2), 281-308. doi: 10.1515/shll-2019-2013
- Carlson, M. T. (2019). Now you hear it, now you don’t: Malleable illusory vowel effects in Spanish-English bilinguals. Bilingualism: Language and Cognition 22(5), 1101-1122. doi: 10.1017/S136672891800086X
- Carlson, M. T. & Gerfen, C. (2011). Productivity is the key: morphophonology and the riddle of alternating diphthongs in Spanish. Language 87(3), 510-538. doi: 10.1353/lan.2011.0054
Courses Regularly Taught
300 Level
3 Credits
Fall 2026 Semester
Spanish
SPAN 314 Spanish Sounds
This course covers Spanish phonetics and phonology. In SPAN 314, we will discuss the inventory of consonants and vowels in Spanish, how they are articulated, and the phonological contexts in which they appear. Time will be spent on overcoming common pronunciation challenges faced by English-speaking learners of Spanish. We will also consider various dialects of Spanish with respect to how they differ in their pronunciation and the particular sounds that make them distinct.
Class Times
Tuesdays, Thursdays from 12:05 p.m.-1:30 p.m.
Prerequisite
SPAN 215
Bachelor of Arts
Social and Behavioral Sciences
400 Level
3 Credits
Fall 2026 Semester
Spanish
SPAN 425 The Spanish Your Teachers Never Taught You
Have you ever failed to understand someone because they didn't use the word "whom" properly? There is often a big difference between how one is "supposed to" use a language, and how the language is actually used in the world. Where does this difference come from? Why are some ways of speaking considered to be more correct, more logical, or more polite, and others are disdained, discouraged, or ridiculed? More importantly, how do these judgments spread, and what are their consequences? In this course we will read and conduct rigorous linguistic (e.g. phonetic or syntactic) analyses of how Spanish is used in a wide range of communities both in countries where Spanish is the majority language as well as in the United States, we will apply methods from sociolinguistics to explore how linguistic variation is associated with social meanings, and we will critically examine how standard varieties are defined and promoted, and how nonstandard varieties are evaluated, both positively and negatively. We will also engage with points of view of Spanish users, community members, and others through critical study of literary works and other primary sources (e.g. social media, opinion writings, political statements, interviews), to listen to what different people say about varieties of Spanish, and about those who use those varieties. Through these efforts we will explore why languages vary and change, and how and why people come to be evaluated (negatively or positively, accurately, or inaccurately) on the basis of how they speak. Satisfies requirements for the major and minor in Spanish.
Class Times
Tuesdays, Thursdays from 9:05 a.m.–10:20 a.m.
Prerequisite
C or better in SPAN 215
Bachelor of Arts
World Language (All), World Lang (12th Unit), Humanities, Social and Behavioral Sciences, International Cultures (IL), United States Cultures (US)
3 Credits
Graduate Linguistics
LING 504 Phonology II
Students in this course will examine the shift from rule-based to constraint-based theories of phonology with an emphasis on analyzing the shortcomings and paradoxes inherent in earlier approaches. At issue will be the search for a better understanding of how the phonological component continually interacts with phonetics and morphology in order to create optimal outputs. Students will analyze particular problems through reading various journal articles treating the same topic from different approaches. They will then evaluate the various approaches systematically. The goal of this course is to prepare students to do close readings of advanced research.
3 Credits
Graduate Linguistics
SPAN 510 Spanish Descriptive Linguistics: Phonology
This is a second graduate course in phonology, with a primary focus on Spanish. Our goals will be to understand the Spanish sound system in the context of phonological theory more generally, and to engage the field by generating and pursuing research questions that have the potential to contribute to advancing our knowledge of this topic. Our goals are both methodological and theoretical. Students will conduct focused explorations of the literature, generate research questions that build on our current knowledge, and develop strategies for answering those questions. Familiarity with the basic concepts of phonology, and with the major schools of thought in phonology (from LING 504) will be assumed.
Class Times
Tuesdays, Thursdays from 9:05 a.m.-10:20 a.m.
3 Credits
Graduate Linguistics
SPAN/LING 519 Statistics for Language Scientists
This course is designed to help students become active participants in the use and development of quantitative data analysis in the language science community. Students will gain familiarity with basic statistical concepts and techniques as well as more advanced techniques that are commonly used in our field. More importantly, students will consider the motivations behind researchers’ choices in how to analyze their data, by reading contributions to the growing literature on quantitative methodology in language science, critiquing published work, and conducting their own analyses of published and unpublished data. The goal is to equip students with the tools to both begin analyzing their own data, and to expand their knowledge by critically examining current practice, and assessing new developments in our field.
3 Credits
Graduate Linguistics
SPAN 597 More together: Multilingualism and the nature of human language
Most humans can be considered speakers of two or more languages, but linguistic theory has generally attempted to explain multilingualism as a special case, implicitly viewing monolingualism as more fundamental. In this course we explore a different perspective, namely that human language is fundamentally variable, multivalent, and plural, or in other words, multilingual. Through readings of theoretical proposals and critiques of published work we will explore the implications of this perspective for our understanding of the nature of human language at the most basic level. Students will develop their thinking through short essays, responses to published work, and in course projects designed to advance our theoretical understanding of language through both exploratory data analysis and hypothesis testing, probing the cutting edge of this topic and developing their abilities to ground their empirical work in well-developed theoretical reasoning.
3 Credits
Graduate Linguistics
SPAN 597 Theorizing Multilingualism
There is now widespread recognition that most humans speak more than one language. This has contributed to increasing criticism of monolingual bias in linguistic theorizing and to the acknowledgment that a full understanding of the human language capacity must include multilingualism. In this course we will survey what has become a wide array of theoretical approaches to multilingualism, seeking to identify the major questions to be answered, and asking what kinds of data can help us answer them. In course projects, we will seek to advance our theoretical understanding through both exploratory data analysis and hypothesis testing.
Editorial Positions
Editorial Board on Continua (open access journal published by Penn State)
Associate Editor at Linguistic Approaches to Bilingualism