I talked to my son all the time. So did his dad. He has such a close relationship with his dad. But what we did (not on the survey) is establish our bedtime routine before he was born. Now at 20 months, we still have it and it works. We all go to bed at the same time and get up together and we have been getting up and going to bed at the same hour since he was born. Don't need an alarm clock with this kid!! :)
btw, did the survey. Good luck with your paper.