"We try to make it as easy as possible for them but, at the same time, there is always that scrutiny. It is there all the time - it is 24/7 - and it is hard work for some."
He says this ahead of a test that will see an unusually high number of inexperienced players take the field. Some are having only their second or third crack at a test match and there is no question about whether they are good enough - the unknown is whether they can stay in the right head space to show they are good enough.
That's the question that applies to most of the 23 involved in Rome.
Can Codie Taylor, for instance, nail his core roles at hooker and keep them accurate for 60 minutes? Will Patrick Tuipulotu be more influential and dominant than he was in Chicago?
For Steven Luatua and Elliot Dixon, there is the request to show their physicality.
Tawera Kerr-Barlow knows he has a bit to do to catch the other two halfbacks in the squad and Damian McKenzie will want to show he can look after the ball and respect the greater intensity of test rugby.
For All Blacks first-timers Rieko Ioane and Liam Coltman, it is the biggest match of their respective careers and they will just want to get on the park and not fall apart.
"Once we get them here it is about watching them, understanding them, getting to know them to see how they are coping," Hansen says.
"It is pretty obvious - for me anyway - when they are coping and it is obvious when they are not. You give them a little bit of a taste if you think they are ready and see how they go.
"I guess it is all about following your own instincts and being aware of what your athlete is capable of.
"And the only way you can do that is by getting to know them and watching them at training and around the environment."