In one study, open workspaces reduced face-to-face interaction by as much as 70%

From The impact of the ‘open’ workspace on human collaboration:

In two intervention-based field studies of corporate headquarters transitioning to more open office spaces, we empirically examined—using digital data from advanced wearable devices and from electronic communication servers—the effect of open office architectures on employees’ face-to-face, email and instant messaging (IM) interaction patterns. Contrary to common belief, the volume of face-to-face interaction decreased significantly (approx. 70%) in both cases, with an associated increase in electronic interaction. In short, rather than prompting increasingly vibrant face-to-face collaboration, open architecture appeared to trigger a natural human response to socially withdraw from officemates and interact instead over email and IM

References

Bernstein, Ethan S., and Stephen Turban. “The Impact of the ‘Open’ Workspace on Human Collaboration.” Philosophical Transactions of the Royal Society B: Biological Sciences 373, no. 1753 (August 19, 2018): 20170239. https://doi.org/10.1098/rstb.2017.0239.