Wii Balance Board validation: MATLAB scripts

This FigShare item

This item contains several scripts to perform and reproduce the data that obtained for a study on the concurrent validity of the Wii Balance Board (WBB) and Kistler force plate (KP).

About the study 

The scripts presented are used for a study to validate the WBB synchronously with the Kistler force plate. The study consisted of two measurements, three bipedal (two legs standing still) trials and six unipedal trials (standing still on one leg). For each task, the scripts create a 'segment' from the COP antero-posterior and medio-lateral (latero-lateral) signals and calculate COP parameters. These include: standard deviation of unidimensional displacement (COPx, COPy), mean velocity of unidimensional displacement (COPx, COPy), total COP pathlength and 95% Predicted Ellipse Area. 

For the analysis files, please check the other item including R scripts, which can be found here: 

Short instructions

Make sure to first run the 'get_force_plate_filenames struct', then the 'makestruct' script,  followed by the 'create wbb timestamps' script, lastly followed by the 'analysis' scripts. The last will output the dataset(s) of Center of Pressure parameters, including displacement measures (including COP pathlength), velocity and a 95% predicted ellipse area per subject, potentially per measurement series. 

Please note, scripts with 1L and 2L relate to one leg (unipedal) balance tasks and 2L for two leg (bipedal) balance tasks. 

How to use

It may be possible that the scripts do not work for your own analysis, but are provided as ‘building blocks’ to replicate or analyse your own COP signal data. Therefore be advised to check the fixed variables at the start of scripts and take a thorough look at the rest of the script before attempting to run it. If you are not able to get it to work, please feel free to get in touch.

Publication

The item is part of a publication. Please cite our article if you decide to use (parts of) the items provided here, see the resource DOI below.