Palace have won only one of their last six games this season under manager Roy Hodgson.
But McArthur told the Express: “Roy is great. His experience is proven.
“We have changed a lot of managers since I have been here, but now under Roy we have got stability. When we lose a couple of games no one panics.
“When he first came in, we lost the first three games, but there was no panic. He's a real, settled, experienced manager, and that sinks down to the players.
“It's not only about when you are losing games. When you are losing, it is easy for a manager to feel under more pressure. You don't get that sense with Roy."