It's something I've never considered, so I've muddled through on a bunch of rationales gained from my own experience of life, things I've read..not particularly child care manuals...and no research papers that I can think of at the moment..did some education theory and psychology study at one time but not for the purpose of working out how to raise my kids...
So, do you have subjective opinions about child rearing or have you got evidence you are doing things right?