It may not be availability so much as conversational style. Anecdotal (I would most likely qualify as high-income for the purposes of that study): Most of th

It may not be availability so much as conversational style. Anecdotal (I would most likely qualify as high-income for the purposes of that study): Most of the time when I am with my now-18-month-old daughter, I give her a lot of authority. If she can say where she wants to go or what she wants to do or what she wants me to do, then in general that's what happens. I have to imagine that creates a great incentive to learn to express your thoughts.