Complex sentence: Despite the fact that she still very rarely spoke unless specifically asked a question her language acquisition to this point was far more rapid than what the hospital's doctors had anticipated, giving them a sense of optimism and heightening their expectations of her potential for learning language.
Split into simpler sentences: Despite the fact that she still very rarely spoke unless specifically asked a question, her language acquisition to this point was far more rapid than what the hospital's doctors had anticipated. This gave them a sense of optimism and heightened their expectations of her potential for learning language.