Director, Phon Farm Lab
Oklahoma State University
Department of Communication Sciences and Disorders
018 Social Sciences & Humanities
Stillwater, OK 74078
Dr. Peter Richtsmeier is an expert in the areas of speech development and speech sound disorders. His research career began in the field of linguistics. He studied typical phonological development at the University of Arizona under Drs. LouAnn Gerken and Diane Ohala, and he defended his dissertation in 2008. After completing a postdoctoral fellowship with Dr. Lisa Goffman at Purdue University, Dr. Richtsmeier transitioned to speech-language pathology in order to better understand child speech and language disorders. He completed his clinical master’s degree at Purdue in 2014. At Oklahoma State, Dr. Richtsmeier teaches courses on developmental speech and language disorders. He also directs the Phon Farm research laboratory where he and his students conduct experiments on child speech development.
PhD, Linguistics, University of Arizona
MS, Speech-Language Pathology, Purdue University
BA, Psychology & Spanish, Washington University in St. Louis
Advanced Language Disorders in Children
Language Disorders in School-Age and Adolescence
Intro to Research
Richtsmeier, P. T. & *Good, A. (2018). Perceptual and production frequencies affect child speech differently. Journal of Speech, Language, and Hearing Research. doi:10.1044/2018 JSLHR-S-17-0391
- Richtsmeier, P. T. & Goffman, L. (2017). Perceptual statistical learning over one week in child speech production. Journal of Communication Disorders, 68, 70-80. doi: 10.1016/j.jcomdis.2017.06.004
- Richtsmeier, P. T. (2016). Phonological and semantic cues to learning from word-types. Laboratory Phonology, 7(1), 1-23, doi: 10.5334/labphon.39
- Richtsmeier, P. T. & Goffman, L. (2015). Trajectories of speech motor learning in typical and impaired children. Journal of Communication Disorders, 55, 31-43. doi: 10.1016/j.jcomdis.2015.02.001
- Richtsmeier, P. T. (2011). Extraction of phonotactic sequences by adults is facilitated by word-types not word-tokens. Laboratory Phonology, 2, 157-183. doi:10.1515/LABPHON.2011.005
- Richtsmeier, P. T., Gerken, L. A., & Ohala, D. K. (2011). Contributions of phonetic token variability and word-type frequency to phonological representations. Journal of Child Language, 38(5), 951-978. doi:10.1017/S0305000910000371
- * Indicates student coauthor.
Other Publications and Manuscripts
Richtsmeier, P. T. Order in the statistical learning of phonotactics. In revision.
Richtsmeier, P. T. & Moore, M. Order effects for perception and production of new words. In preparation.
Goffman, L. & Richtsmeier, P. T. Order effects in children who complete multiple statistical learning tasks. In preparation.
- Richtsmeier, P. T. & *Good, A. Perceptual and production frequencies affect child speech differently. Under review.
- McAllister Byun, T., Richtsmeier, P., & Maas, E. (2013). Covert contrast in child phonology is not necessarily extragrammatical. Extended abstracts from the annual meeting of the Linguistic Society of America, Boston, MA. http://elanguage.net/journals/lsameeting/article/view/3553eLangauge
- Narayan, A., Weber, N., Richtsmeier, P. T., Trinetta, V., and Nelson, D. (2012). Postdoctoral needs and concerns: Purdue University and beyond. POSTDOCket, http://www.nationalpostdoc.org/publications/postdocket
- Richtsmeier, P. T. (2010). Child phoneme errors are not substitutions. Toronto Working Papers in Linguistics, 33. Retrieved from\\ http://twpl.library.utoronto.ca/index.php/twpl/article/view/6889
- Richtsmeier, P. T., Gerken, L. A., & Ohala, D. K. (2009). Induction of phonotactics from word-types and word-tokens. In J. Chandlee, M. Franchini, S. Lord, and M. Rheiner (Eds.) Proceedings of the 33rd Annual Boston University Conference on Language Development (pp. 432-443). Somerville, MA: Cascadilla Press
Richtsmeier, P. T. & *Yanez, C.. (2019, June). Name writing ability and phonological development in 3- and 4-year-olds. Poster presented at the meeting of the Symposium for Research on Child Language Disorders, Madison, WI.
Richtsmeier, P. T. & *Burgess, P. (2018, November). Preliminary evidence that production practice outweighs input frequency manipulations in a speech accuracy task. Paper presented at the annual ASHA convention, Boston, MA.}\medskip
Richtsmeier, P. T., Alderson, M. A., & *Brockette, A. (2018, June). Memory usage during statistical learning. Poster presented at the meeting of Laboratory Phonology XVI, Lisbon, Portugal.
- Richtsmeier, P. T. & *Good, A. (2017, June). Disentangling frequency and talker variability in a statistical learning task. Paper presented at the meeting of the International Child Phonology Conference, Washington, DC.
- Richtsmeier, P. T. & *Good, A. (2016, June). Disentangling the effects of perceptual frequency and talker variability on speech development. Poster presented at the meeting of the Symposium for Research on Child Language Disorders, Madison, WI.
- Richtsmeier, P. T. (2015, November). Apps for data collection and presentation in school-based speech therapy: A review. Poster presented at the annual ASHA convention, Denver, CO.
- * Indicates student coauthor.
Phon Farm Lab
- The Phon Farm lab is dedicated to the study of speech development. We want to better understand how children develop into accurate speakers of their native language. Related questions include why all children make some speech errors and why a small number of children make persistent errors and eventually require therapy. Our approach is primarily experimental, meaning that we look at factors that make children more or less accurate within our lab. For example, we’re interested in what factors make children more or less accurate when saying a new word like “maffpem”.
- Lab Location - 020 Murray Hall
- Visit the Phon Farm's Facebook Page