I work in a special needs preschool room. Many of our parents have had potty-training battles with their kids. Here's the advice we give them:
1. Choose a period of days (maybe a weekend) when you have nothing planned.
2. Hide all of the diapers in the house. They no longer exist.
3. Put the child in underwear and explain what they need to do when it's time to use the bathroom. Do not over-explain. Do not make a big deal of it.
4. Immediately reward each and every success with something tangible. Sticker charts and the promise of a reward after a number of successes don't work for every child. Some can't wait that long and some don't understand the concept. However, something as simple as an M&M everytime they go is a great reinforcement to keep it up.
5. Do not punish them for accidents. Do not raise your voice. Simply take them to the bathroom to change their clothes. This could even include a quick shower or bath each and every time they have an accident. Do not lay the child down and do the changing. He or she should stand up and do as much of the work, including putting dirty clothes in the hamper or washer, as possible.
6. Give quick, gentle reminders about every two hours ("remember to let me know when you need to use the potty"). Otherwise, go about your day and do not focus on it or make it into a big deal. As soon as the child senses that it's a big deal for you, you will have anarchy!
You are in control of the situation, not the child. Stay calm and focused, don't give lengthy explanations, and don't give in to tantrums or whining. The child will eventually give up control and do it your way. Good luck!
