CV [in prep]

Education

  • Ongoing - Ph.D. candidate, Communication Sciences and Disorders, University of Wisconsin–Madison.
    • Ph.D. minor course work in statistics and psychology.
  • 2013 - M.S., Speech-Language Pathology, University of Wisconsin–Madison.
  • 2009 - B.S., Linguistics and English, University of Wisconsin–Madison.

Current Position

Research Assistant - Little Listeners project.

I prepare and analyze eyetracking data from a series of word recognition experiments with toddlers. I develop R packages for handling, visualizing and modeling these data, including an interactive Shiny dashboard.

Previous Position

Research Assistant - Learning to Talk project.

This project was a three-year longitudinal study of preschoolers done in collaboration by three universities. I was responsible for data organization, validation, automation and general data-cleaning tasks for the project. I developed R packages to automate these validation and back-up tasks, and I developed a MySQL database supporting R package for our data. I analyzed eyetracking and speech perception experiments from this project.

Programming and Statistics

Languages: Mastery of R. Regular practice writing SQL, HTML/CSS, XML, YAML, Stan. Some practice with Java, Javascript and Python. Exposure to Clojure.

Computing tools and technologies: bash/batch scripting, git and GitHub, tidy data and the R tidyverse, Shiny, knitr/rmarkdown, Docker, Praat, makefiles, regular expressions.

Statistics: Regression: generalized linear models, hierarchical and mixed effects models, and Bayesian versions of these models. Structural equation modeling and factor analysis. Neural networks: practice with shallow networks, familiarity with how some deep network architectures work (CNNs, RBMs, RNNs, denoising autoencoders).

Publications

Mahr, T., & Edwards, J. R. (in prep). Using language input and lexical processing to predict vocabulary size [working title].

Law, F., II, Mahr, T., Schneeberg, A., & Edwards, J. R. (2016). Vocabulary size and auditory word recognition in preschool children. Applied Psycholinguistics. 10.1017/S0142716416000126.

Mahr, T., McMillan, B. T. M., Saffran, J. R., Ellis Weismer, S., & Edwards, J. R. (2015). Anticipatory coarticulation facilitates word recognition in toddlers. Cognition, 142, 345–350. 10.1016/j.cognition.2015.05.009. [ Data, scripts, stimuli on Github.]

Software

L2TDatabase. R package for working with the Learning To Talk lab’s MySQL database. Helper functions for creating, updating, backing-up MySQL tables in R.

lookr. R package for dealing with eyetracking data for the Learning To Talk lab.

rprime. R package for working Eprime text files.

retrace. A pure R implementation of the TRACE model of word recognition. Too slow to be useful, but great learning experience.

Presentations

Conference Talks

Mahr, T., McMillan, B. T. M., Saffran, J. R., & Edwards, J. R. (2014, November). Toddlers are sensitive to anticipatory coarticulation during word recognition. Presentation at the 39th annual Boston University Conference on Language Development, Boston, MA.

Mahr, T., McMillan, B. T. M., Saffran, J. R., & Edwards, J. R. (2014, September). Are toddlers sensitive to anticipatory coarticulation during word recognition?. Presentation at the 19th annual Mid-Continental Phonetics & Phonology Conference, Madison, WI.

Coauthored (i.e., I didn’t talk, but did some stats and made figures)

Law, F., II, Mahr, T., & Edwards, J. R. (2015, November). Exploring effects of expressive vocabulary size and maternal education on lexical processing by preschoolers using the visual world paradigm. Presentation at the 40th annual Boston University Conference on Language Development, Boston, MA.

Edwards, J. R., & Mahr, T. (2015, November). Speech perception and spoken word recognition in young children. Presentation at the 170th Meeting of the Acoustical Society of America, Jacksonville, FL. 10.1121/1.4933949.

Invited Talks

Mahr, T. (2015, March). Let the data flow: Pipelines in R with dplyr and magrittr. Presentation for the Madison R Users Group, Madison, WI. [ Github repository.]

Mahr, T. (2014, October). Using eyetracking to study toddlers’ sensitivity to coarticulation during word recognition. Presentation for the UW-Madison Communication Sciences & Disorders Professional Seminar, Madison, WI.

Posters

Mahr, T., Venker, C., Premo, E., Ellis Weismer, S., Saffran, J. R., & Edwards, J. R. (2016, June). Preschoolers with autism treat nonwords and mispronunciations differently. Poster session presented at the annual Symposium on Research in Child Language Disorders, Madison, WI.

Mahr, T., & Edwards, J. R. (2015, November). Using language input and lexical processing to predict vocabulary size. Poster session presented at 56th Annual Meeting of the Psychonomic Society, Chicago, IL.

Erskine, M. E., Mahr, T., Munson, B., & Edwards, J. R. (2015, June). The lexical restructuring hypothesis: Two claims of phonological awareness evaluated. Poster session presented at the annual Symposium on Research in Child Language Disorders, Madison, WI.

Mahr, T., Law, F., II, & Edwards, J. R. (2014, June). The influence of home language input and lexical processing efficiency on vocabulary size in 3-year-olds. Poster session presented at the annual Symposium on Research in Child Language Disorders, Madison, WI.

Mahr, T., & Seidel, C. (2014, February). Comparison of the GFTA-2, KLPA-2, HAPP-3 and BBTOP for different consonant error profiles. Poster session presented at the annual conference of the Wisconsin Speech-Language Pathology and Audiology Association, Middleton, WI.

Seidel, C., & Mahr, T. (2013, November). A quantitative comparison of articulation assessments for different consonant error profiles. Poster session presented at the Annual Conference of the American Speech-Language-Hearing Association, Chicago, IL.

Mahr, T., & Edwards, J. R. (2013, June). Do orienting stimuli create additional task demands in the looking-while-listening paradigm?. Poster session presented at the annual Symposium on Research in Child Language Disorders, Madison, WI.

Teaching

Lecturing

  • Guest lecture on phonological disorders for introductory communicative disorders course.
  • Guest lecture and accompanying online exercise on assessment of speech sounds for phonetics and phonological disorders course.

Clinical Experience

These are positions and roles I worked in as a student speech-language clinician.

  • 2013-2014: Speech-language diagnostics (eventually as a long-term substitute for position), Middleton Cross Plains School District.
  • 2013: Pediatric voice clinic, American Family Children’s Hospital.
  • 2012: Fluency clinic, UW-Madison Speech & Hearing Clinic.
  • 2012: Telling Life Stories program (helping individuals with aphasia create a scrapbook biography), UW-Madison Speech & Hearing Clinic.
  • 2012: Transgender voice clinic, UW-Madison Speech & Hearing Clinic.
  • 2011: Phonology clinic, UW-Madison Waisman Center.

Awards

tk tk training-grants

2016: Jean Berko Gleason Award for highest scored student submission at the 41st Boston University Conference on Language Development.

2014: Paula Menyuk Travel Award recipient at the 39st Boston University Conference on Language Development.

2014: Emma Allen Scholarship. Given by the Dept. of Communication Sciences and Disorder at UW-Madison.

2012: Students Preparing for Academic-Research Careers (SPARC) Award. Given by the American Speech-Language-Hearing Association.