Update README.md

Author: matteobiagiola

README.md

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 The repository contains two subdirectories to replicate:
 - simulation experiments, i.e., [simulation-code](simulation-code/README.md)
 - web application subject experiments, i.e., [web-application-code](web-application-code/README.md)
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+The raw data for the paper are on [Figshare](https://figshare.com/s/1d08cf3473c547ef4616).