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Study Aim: test whether stuttering in adults and children is dimensional (i.e. a "spectrum") or categorical. This project aims to collaborate with researchers who have collected datasets of stuttering-related metrics, such as stuttering frequency and dysfluency durations, from a large enough population of stutterers and non-stutterers (n=300 subjects) to use taxometric procedures. Techniques will be employed from the field of taxometrics, which is a suite of tools traditionally employed in psychiatry for testing whether pathology constructs (in this case stuttering) describe disrete categories or instead a continuum of severity levels
Literature
Literature
Resources on taxometrics:
Borsboom ea 2016 - comparison of taxometrics to other methods for addressing questions of latent structure; describes MAXCOV
Haslam ea 2020 - meta-analysis of hundreds of taxometric studies
Ruscio ea 2006 - introductory book [pdf here] describing taxometric methods in detail
John Ruscio's RTaxometrics software package
Example taxometrics papers in speech/language disoders:
Dollaghan 2004 - Specific Language Impairment in 3-4yo children found to be non-categorical (MAMBAC technique)
Dollaghan 2011 - Specific Language Impairment in 6yo children found to be non-categorical (MAMBAC technique)
O'Brien et al. 2012 - Dyslexia with vs. without phonological deficitis found to be categorical (MAMBAC, MAXEIG and L-Mode techniques)
Original paper proposing taxometrics for stuttering:
Seery et al. 2007 - [section 2 by Kate Watkins]
Presentations
Presentations
Link to external presentations (e.g., conference, external talks)
Manuscripts
Manuscripts
Link to manuscripts in collaborative software (e.g., google drive, one drive)
Link to PDFs at key points in publication process (e.g., preprints, final accepted version, published version)
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