Hi Becky & Karen,
There has been a bit of recent research in this area. Here are a couple of 2019 articles you might find interesting:
https://onlinelibrary.wiley.co...bs/10.1002/jts.22431
https://www.jstage.jst.go.jp/a...b_2018-0088/_article
Becky, I would love to learn more about the research you are doing. One of my colleagues is designing a study on a group intervention for improving police officer well-being.
Cheers,
Suzie