A methodology using in-chair movements as an objective measure of discomfort for the purpose of statistically distinguishing between similar seat surfaces

Vincenzo Cascioli, Zhuofu Liu, Andrew Heusch, Peter W McCarthy

Research output: Contribution to journalArticlepeer-review

Abstract

This study presents a method for objectively measuring in-chair movement (ICM) that shows correlation with subjective ratings of comfort and discomfort. Employing a cross-over controlled, single blind design, healthy young subjects (n = 21) sat for 18 min on each of the following surfaces: contoured foam, straight foam and wood. Force sensitive resistors attached to the sitting interface measured the relative movements of the subjects during sitting. The purpose of this study was to determine whether ICM could statistically distinguish between each seat material, including two with subtle design differences. In addition, this study investigated methodological considerations, in particular appropriate threshold selection and sitting duration, when analysing objective movement data. ICM appears to be able to statistically distinguish between similar foam surfaces, as long as appropriate ICM thresholds and sufficient sitting durations are present. A relationship between greater ICM and increased discomfort, and lesser ICM and increased comfort was also found.

Original languageEnglish
Pages (from-to)100-9
Number of pages10
JournalApplied ergonomics
Volume54
DOIs
Publication statusPublished - 28 Dec 2015

Keywords

  • discomfort
  • comfort
  • in-chair movement
  • Sitting

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