Dowell spent last season at the City Ground.
He said, "I learned about changing the way you play depending on how the game is going.
"If you are winning 1-0, you are less likely to try stuff – you try to keep hold of the ball instead.
“It was my first experience of proper football. I played 40-odd games last season and off the pitch I grew up a lot living on my own. Every week, I had that need to win.
"That was the plan when I went out on loan – to get that experience under my belt and bring that back to Everton and use it to push into the first team."