True, this and other studies are very deficit oriented. It 's a first step. But the researcher's are not those of the 20th century just looking around for reasons "to lock us up". Back then they never would say "dear Zooville Community, thanks for participation, best wishes ..." . And still, this is Zooville and not part of any university.Seems like it's looking for a link between zoo's and low self a stame people and under achievers which is very very far from the truth about real zoo's people. ...