Internal speech is faster than external speech: Evidence for feedback-based temporal control

Tilsen, Sam

doi:10.1016/j.cognition.2023.105713

Cited by 1 publication

(1 citation statement)

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“…Accordingly, the four conditions were designed to assess whether varying levels and types of auditory feedback affect speech features differently in individuals with Parkinson's disease compared to controls. Conditions 1, 2, and 3 (normal feedback, whisper, and noise) manipulate the amount of external auditory feedback: full, partial, and none 27 . This manipulation is based on the hypothesis that speakers use sensory feedback to control speech rate and articulatory timing 28 .…”

Section: Methodsmentioning

confidence: 99%

Speech's syllabic rhythm and articulatory features produced under different auditory feedback conditions identify Parkinsonism

Piña Méndez,

Taitz,

Palacios Rodríguez

et al. 2024

Sci Rep

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Diagnostic tests for Parkinsonism based on speech samples have shown promising results. Although abnormal auditory feedback integration during speech production and impaired rhythmic organization of speech are known in Parkinsonism, these aspects have not been incorporated into diagnostic tests. This study aimed to identify Parkinsonism using a novel speech behavioral test that involved rhythmically repeating syllables under different auditory feedback conditions. The study included 30 individuals with Parkinson's disease (PD) and 30 healthy subjects. Participants were asked to rhythmically repeat the PA-TA-KA syllable sequence, both whispering and speaking aloud under various listening conditions. The results showed that individuals with PD had difficulties in whispering and articulating under altered auditory feedback conditions, exhibited delayed speech onset, and demonstrated inconsistent rhythmic structure across trials compared to controls. These parameters were then fed into a supervised machine-learning algorithm to differentiate between the two groups. The algorithm achieved an accuracy of 85.4%, a sensitivity of 86.5%, and a specificity of 84.3%. This pilot study highlights the potential of the proposed behavioral paradigm as an objective and accessible (both in cost and time) test for identifying individuals with Parkinson's disease.

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Section: Methodsmentioning

confidence: 99%