In a recent report, it was claimed that companies adopting a four-day workweek reported a marked increase in employee satisfaction and productivity. Proponents of this change argue that a reduced working schedule allows employees to recharge and leads to fewer burnout cases. However, critics contend that this claim lacks sufficient evidence as it primarily relies on anecdotal reports from a few organizations.
Given this argument, it would be most helpful to know which of the following pieces of information would best undermine the critics' assertion about the lack of evidence supporting the claim?