Segmental speech error data elicited at prosodically-defined locations in tongue twisters

Area of Science:

• Linguistics
• Phonetics
• Psycholinguistics

Background:

• Speech errors, such as perseveration and anticipation, are common in fluent speech.
• Understanding the phonetic and prosodic factors influencing speech errors is crucial for speech production models.

Purpose of the Study:

• To investigate the influence of prosodic domains (intonational phrases and utterances) on the occurrence of speech errors.
• To examine how the position of error-prone segments within these domains affects error types (perseveration vs. anticipation).

Main Methods:

• Collected tongue twister error data from 44 unimpaired speakers.
• Speakers produced 40 tongue twisters with controlled manipulation of segment position within prosodic units.
• Recorded and analyzed counts of perseveration and anticipation errors on initial segments of phrase-initial or phrase-final words.

Main Results:

• Speech error patterns, specifically perseveration and anticipation, were found to be sensitive to the manipulation of segment position within intonational phrases and utterances.
• The study controlled for factors like phrase-level prominence, providing clear data on positional effects.

Conclusions:

• The findings contribute to understanding the cognitive mechanisms underlying speech production and error formation.
• Positional effects within prosodic structures are significant factors in speech error occurrence, informing theories of phonological encoding.