Related Experiment Video
Updated: Jul 6, 2026
Uncovering Beat Deafness: Detecting Rhythm Disorders with Synchronized Finger Tapping and Perceptual Timing Tasks
Published on: March 16, 2015
A Cross-Language Study of Oral Diadochokinesis: Rates and Rhythm
Yunjung Kim1, Jeffrey Berry2, Seung Jin Lee3
1School of Communication Science and Disorders, Florida State University, Tallahassee, Florida, USA, ykim19@fsu.edu.
Introduction:
Oral diadochokinesis (DDK) is a commonly used task in assessing motor development and disorders. Previous research has largely assumed its language-universal applicability, though evidence is limited. This study compared oral DDK performance (/pʌ/, /pʌtʌkʌ/) between two groups of speakers with different native languages, focusing on DDK rates and rhythm.
Methods:
Participants included 56 young adults, with 28 American English speakers and 28 Korean speakers. Acoustic measures included DDK rates and normalized pairwise variability index (nPVI) of syllable and intersyllable interval durations.
Results:
Group differences were found for /pʌtʌkʌ/ but not for /pʌ/, such that English speakers showed decreased repetition rates and increased nPVI for both syllable and intersyllable interval durations compared to Korean speakers.
Conclusion:
DDK has been frequently used in studies of motor speech development and disorders with a notable increase especially in the last decade. Our findings reveal language-specific characteristics and highlight the need for language-specific reference data in research and clinical practice.
Related Concept Videos
01:29Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
01:22Language Development
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
01:27Language and Cognition