This research was supported in part by grants from the National Institute on Deafness and Other Communication Disorders (NIH-NIDCD) R01 DC00646 and R01 DC009890, the Barkley Trust and the Nebraska Speech-Language-Hearing Foundation. The authors would like to thank Nirmal Srinivasan, Cynthia Didion, Lauren Brockevelt, Laura Beshaler, Antje Mefferd, Paige Leising, Wendy Quach, Susan Fager, Lacey LaBarge, Cory Quinlan, Cara Ullman, and Julie Wyss for their help in data collection and analysis.
Increases in Cognitive and Linguistic Processing Primarily Account for Increases in Speaking Rate With Age
Article first published online: 17 JAN 2013
© 2013 The Authors. Child Development © 2013 Society for Research in Child Development, Inc.
Volume 84, Issue 4, pages 1324–1337, July/August 2013
How to Cite
Nip, I. S. B. and Green, J. R. (2013), Increases in Cognitive and Linguistic Processing Primarily Account for Increases in Speaking Rate With Age. Child Development, 84: 1324–1337. doi: 10.1111/cdev.12052
- Issue published online: 12 JUL 2013
- Article first published online: 17 JAN 2013
- National Institute on Deafness and Other Communication Disorders. Grant Numbers: R01 DC00646, R01 DC009890
Age-related increases of speaking rate are not fully understood, but have been attributed to gains in biologic factors and learned skills that support speech production. This study investigated developmental changes in speaking rate and articulatory kinematics of participants aged 4 (N = 7), 7 (N = 10), 10 (N = 9), 13 (N = 7), 16 (N = 9) years, and young adults (N = 11) in speaking tasks varying in task demands. Speaking rate increased with age, with decreases in pauses and articulator displacements but not increases in articulator movement speed. Movement speed did not appear to constrain the speaking. Rather, age-related increases in speaking rate are due to gains in cognitive and linguistic processing and speech motor control.