TY  - JOUR
A1  - Lialiou, Maria
A1  - Sotiropoulou, Stavroula
A1  - Gafos, Adamantios I.
T1  - Spatiotemporal coordination in word-medial stop-lateral and s-stop clusters of American English
JF  - Phonetica : international journal of phonetic science
N2  - This paper is concerned with the relation between syllabic organization and intersegmental spatiotemporal coordination using Electromagnetic Articulometry recordings from seven speakers of American English (henceforth, English). Whereas previous work on English has focused on word-initial clusters (preceding a vowel whose identity was not systematically varied), the present work examined word-medial clusters /pl, kl, sp, sk/ in the context of three different vowel heights (high, mid, low). Our results provide evidence for a global organization for the segments involved in these cluster-vowel combinations. This is reflected in a number of ways: compression of the prevocalic consonant and reduction of CV timing in the word-medial cluster case compared to its singleton paired word in both stop-lateral and s-stop clusters, early vowel initiation (as permitted by the clusters' phonetic properties), and presence of compensatory relations between phonetic properties of different segments or intersegmental transitions within each cluster. In other words, we find that the global organization presiding over the segments partaking in these word-medial tautosyllabic CCVs is pleiotropic, that is, simultaneously expressed in multiple phonetic exponents rather than via a privileged metric such as c-center stability or any other such given single measure employed in previous works.
KW  - American English
KW  - intersegmental coordination
KW  - s-stop clusters
KW  - stop-lateral clusters
KW  - syllabic structure
Y1  - 2021
U6  - https://doi.org/10.1515/phon-2021-2010
SN  - 0031-8388
SN  - 1423-0321
VL  - 78
IS  - 5-6
SP  - 385
EP  - 433
PB  - De Gruyter Mouton
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kuberski, Stephan R.
A1  - Gafos, Adamantios I.
T1  - Fitts’ law in tongue movements of repetitive speech
JF  - Phonetica : international journal of phonetic science
N2  - Fitts' law, perhaps the most celebrated law of human motor control, expresses a relation between the kinematic property of speed and the non-kinematic, task-specific property of accuracy. We aimed to assess whether speech movements obey this law using a metronome-driven speech elicitation paradigm with a systematic speech rate control. Specifically, using the paradigm of repetitive speech, we recorded via electromagnetic articulometry speech movement data in sequences of the form /CV.../ from 6 adult speakers. These sequences were spoken at 8 distinct rates ranging from extremely slow to extremely fast. Our results demonstrate, first, that the present paradigm of extensive metronome-driven manipulations satisfies the crucial prerequisites for evaluating Fitts' law in a subset of our elicited rates. Second, we uncover for the first time in speech evidence for Fitts' law at the faster rates and specifically beyond a participant-specific critical rate. We find no evidence for Fitts' law at the slowest metronome rates. Finally, we discuss implications of these results for models of speech.
Y1  - 2021
U6  - https://doi.org/10.1159/000501644
SN  - 0031-8388
SN  - 1423-0321
VL  - 78
IS  - 1
SP  - 3
EP  - 27
PB  - De Gruyter Mouton
CY  - Berlin
ER  -