I am so happy to announce that we have successfully published a paper on the articulation of stem vowels in morphologically complex words in Morphology (“Paradigmatic enhancement of stem vowels in regular English inflected verb forms”). It has been a long journey. I wrote the first draft of this paper four years and three months ago. The data was recorded in 2013!
In our study, that I performed together with Michael Ramscar, Benjamin Tucker and Harald Baayen, we find that articulatory movements are partially more extreme in high-frequency words than in low-frequency words, supporting our previous findings in articulation and simultaneously contradicting predictions by the Smooth Signal Redundancy Hypothesis.
In our analysis, we used Generalized Additive Mixed Models, a regression technique that allows to investigate non-linear relationships between a dependent variable and one or multiple predictors. If you want to investigate such relationships on your own, the paper provides you with a good introduction to how assess the relative importance of potentially competing and collinear predictors. The supplementary material also provides you with the necessary data and code.
If you want to learn what these findings tell us about speech production, you can find the paper here. If you want to know more about speech production and articulation, check out my other publications here.