Perceptual constraints on frequency ratio performance in motor-respiratory coordination

Laura M. Gonzales, Eric E. Hessler, Polemnia G. Amazeen

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


In motor-respiratory coordination, people typically maintain frequency ratios that are from lower levels of a mathematical structure known as the Farey tree. A hypothesized mechanism for motor-respiratory coordination is the visceral piston (Bramble & Carrier, 1983)-mechanical loading of the lungs due to footfalls, for example, imposes a rhythm on breathing. The occurrence of motor-respiratory coordination in exercises in which there is no visceral piston (e.g., bicycling and wheelchair propulsion) implies that there are other mechanisms. We examined whether there is a perceptual basis for motor-respiratory coordination. In Experiment 1, participants viewed simulated ratios side by side and, in a forced-choice paradigm, judged whether they were the same or different. In Experiment 2, participants performed ratios using feedback displays in which different ratios looked either the same or different. Lower level ratios were less likely than higher level ratios to be confused with other ratios. Ratios that could be distinguished perceptually were performed more accurately and less variably than ratios that appeared the same.

Original languageEnglish (US)
Pages (from-to)1-23
Number of pages23
JournalEcological Psychology
Issue number1
StatePublished - Jan 2010

Bibliographical note

Funding Information:
Preparation of this article was supported by National Science Foundation Grant BCS-0447039. We acknowledge the assistance of John Payne in data collection. We thank Stephen Goldinger, Michael Hout, and Peter Killeen for helpful discussion and comments on this work and Dhaval Parekh for technical assistance.


Dive into the research topics of 'Perceptual constraints on frequency ratio performance in motor-respiratory coordination'. Together they form a unique fingerprint.

Cite this