I think Joseph has changed from chapter one to chapter two because in the last chapter he was timid, shy, more outgoing, and he did not give that much of a effort.
Joseph is not as timid as he was in chapter one now because he was walking onto the black ice that he knew could break under his weight.
I think Joseph is less shy because last chapter he was not speaking that much and he would not hold a stare between him and someone and now in chapter two he is talking a little bit more to Jack then he was before.
Lastly Joseph is more outgoing now because it even says in chapter two that he beat the "Legless Man" by 3 seconds in gym.
That is why I believe Joseph has changed a little between chapters one and two.