Electropalatography (EPG) is a computer-based device that uses a fitted pseudopalate (similar to an orthodontic retainer) with embedded electrodes to track tongue-to-palate contact during speech for the purposes of providing treatment for a variety of communication disorders. This study evaluated six elementary school-aged children's ability to adapt their speech to the presence of the pseudopalate in their mouth. The participants' adaptation for the consonants /t/ and /k/ was examined over eight time intervals throughout a two and half hour time period. Adaptation was evaluated by measuring the duration, spectral mean, spectral variance, and relative intensity of the target sounds. The participants demonstrated significant changes in speech patterns upon initial placement of the pseudopalate across the spectral parameters of mean, variance, and relative intensity. However, no significant differences in duration were found for either phoneme in the pseudopalate versus no pseudopalate conditions. Therefore, temporal parameters for consonant duration were relatively unaffected by the pseudopalate. The children in the study were able to make some speech adaptations to the pseudopalate, however evidence from the /t/ and /k/ productions indicated that the majority of participants were not able to fully adapt to the EPG device during the two and a half hour time period. Clinicians using EPG must take adaptation effects into consideration.
College and Department
David O. McKay School of Education; Communication Disorders
BYU ScholarsArchive Citation
Knapp, Kara Brianne, "Children's Adaptation to Electropalatography: Evidence From Acoustic Analysis of /t/ and /k/" (2014). Theses and Dissertations. 4118.
electropalatography, adaptation, stop consonants