Too-broad questions, such as, "What's on your mind?" are apt to be answered "nothing" nearly one hundred percent of the time. Be careful of slipping into ""psycho-speak," however. Kids pick up instantly your attempt at being a pseudo-shrink. Most resent it and are apt to tune out anything that sounds like you're reading a script from the latest child-psychology text.
Marge M. Kennedy (1994). “The Single-parent Family: Living Happily in a Changing World”, Three Rivers Press (CA)