Science News explains that the participants were assessed according to “which of them, as children, had witnessed domestic violence, experienced mental or physical abuse or neglect, or lived with someone who went to prison, abused drugs or alcohol, or was mentally ill. ”
Science News shpjegon se ata u klasifikuan si persona që « në fëmijërinë e tyre, kishin qenë dëshmitarë të dhunës në familje, me ta ishte abuzuar fizikisht, mendërisht ose ishin lënë pas dore, ose kishin jetuar me dikë që e burgosën më pas, që drogohej, pinte ose ishte i sëmurë mendor ».