… you?   This paper took over two years. I was working on other project during that time, but I never put this one down. In fact, it took so long that I conducted a … since we don't have many ways to predict how language skills will develop over time.   What kind of feedback have you got received from fellow researchers on this? … you?   This paper took over two years. I was working on other project during that time, but I never put this one down. In fact, it took so long that I conducted a …