The hypothesis of this episode is that any act we take to forgo our own desires in order to prioritize God will yield good spiritual fruit. The experiment is to replace something in your life with time spent with God.
Jeremiah talks about spiritual transformation. The hypothesis is that the process of growth is incremental and that we should not expect overnight perfection. The experiment is to root out the negative paradigm that change is instantaneous, and instead rely on the incremental change which occurs in a relationship with the heavenly Father.