Workshop #2

Workshops are free of charge for all registered conference participants.

Title:

Compositional data analysis: examples of applications in physical activity research

Authors:

Professor Sebastien Chastin, Glasgow Caledonian University, UK, Ghent University, Belgium (presenter)

Dorothea Dumuid, University of South Australia, Adelaide, Australia (presenter)

Professor Timothy Olds, University of South Australia, Adelaide, Australia (presenter)

Dr Zeljko Pedisic, Victoria University, Melbourne, Australia (chair/devil’s advocate)

Description

Compositional data analysis (CoDa) has recently gained increasing popularity among physical activity (PA) researchers as a method for analysing times spent in movement and non-movement behaviours. This workshop will present: [i] an overview of a recent shift in PA research paradigm towards using CoDa; [ii] reasons for using CoDa; [iii] key CoDa methods; and [iv] examples of the use of CoDa in previous PA studies.

Programme

  • CoDa in physical activity and sedentary behaviour research: shifting to a new research paradigm (Timothy Olds, 10 minutes);
  • Thinking compositional (Sebastien Chastin, 15 minutes);
  • Summary measures for compositional data (Sebastien Chastin, 10 minutes);
  • Graphical presentation of compositional data (Sebastien Chastin, 10 minutes);
  • Questions and answers (10 minutes);

Coffee break (10 minutes)

  • Analysing determinants/correlates of a composition (Dorothea Dumuid, 10 minutes);
  • Establishing relationship between a composition and an outcome variable (Dorothea Dumuid, 15 minutes);
  • Isotemporal substitution model for compositional data (Dorothea Dumuid, 10 minutes);
  • Future directions, opportunities, and challenges (Timothy Olds, 10 minutes);
  • Questions and answers (10 minutes).