Thus far I've potty trained three children, all girls. My oldest at about 24 months, my second at 28 months, and my neighbors little girl at 19 months.
I start out for two days naked in the bathroom or a large room with a floor that is easily cleaned. I gather books, toys and so on to keep us busy for a few hours. I fill a few cups with juice (to keep it really tastey and inviting)....then we wait. No pants on so I can see when they start to pee pee. With plenty of juice it typically doesn't take long.
When I see the pee pee I hurry and sit them on the potty. I show them the pee pee on their leg and the floor and say that goes in the potty. I might let them pee pee on themselves the first time and talk about the potty. Then we spend the next few times quickly sitting on the potty. For some reason they don't care for the sensation of pee pee running down their legs and they might actually start to hold it. If they do that, you know they are ready to be potty trained.
We might run around for the rest of the day with no panties. I have lots of carpet cleaner around for accidents and I keep the potty chair real close.
Once they have a few accidents it doesn't take much more for them to realize what they are supposed to do.
After a day or two of that...very time consuming. We put on big girl panties...thick cloth diaper like panties (don't do pull-ups...those are just diapers to most kids...save those for when they about have the potty training down and you need to go to the store or church).
We still keep the potty close and then I remind them every 10 minutes or so to tell me when they need to go potty. Over and over and over I remind them. At this point I also try to watch and determine when they might go poopies. I try to catch them and put them on the potty whie they are doing it. (that typically takes longer and seems to be more stressful for most kids...but don't worry about a little crying...they will get over it and never rememeber a thing later)
Once I get them to tell me they need to pee pee on the potty then I will sternly scold them if they have an accident. Nothing too dramatic but stern. I often will give a chocolate chip and chear like a mad woman when they make it to the potty. If you have older kids to chear too that works nicely.
I will also take them with me every time I go potty. I even chear for myself when I go so they get the idea that it is a great thing to do. MOst kids love the praise.
I will not allow mine to potty in a diaper...we won't wear one after we have started to train. Only at night if they aren't waking up dry yet. Not even for naps do we wear diapers. Otherwise they will hold their poopies to go in the diaper during nap time.
The first week to two weeks I will even sit them on the potty every hour or so (or shorter intervals if they drink bunches of fluids...good idea to give them tasety stuff to get them drinking more for this time).
After a week or two they typically can tell you they need to go.....but if you go outside to play, you will need to remind them to tell you every so often because that is the time they will forget.
Constantly remind her she is a big girl. Maybe even let her pick out some panties when she starts to get the hang of it. A little chocolate chip or m&m as a reward helps too. Only one and only when they actually go on the potty....don't give in. After a few weeks they totally forget about the treat.
Both of mine had few accidents after the first two weeks. The 19 month old has had about one or two a week for about a month, but she's doing really well for her age. Only problem is she's holding her poopies until bedtime at night and pooping in her diaper. Momma doesn't feel comfortable putting her to bed without a diaper yet. I figure she will keep doing it until momma just tries it or maybe by the time she turns 2 or 2 1/2....maybe.
I've heard of mom's giving their kids pull-ups to go poopies because they are afraid of the toilet. Me personally...I think it is ridiculous. I'm one of those moms that believes I'm the mom and you will do what I say. Doesn't matter what kind of fuss they put up...mine had to sit on the potty to pee pee and poop. At first I might get a little crying, but I made them sit no matter what. I would hug them and reassure them that they were going to be fine, but they had to sit....period. Pee pee and poopies go on the potty and that was that. No diapers, no pull-ups, no accidents in your panties.
My oldest is five, her sister is three and they aren't psychologically damamged, they don't have potty issues, and they love mommy very much. So I'm not sure what they big deal is with these moms that are afraid to make their children do what they are supposed to do. It is what is best for them and they will not be damaged because they cried for a few minutes or got a little scared of the potty.
Now my oldest wanted to sit on the big toilet...so we got her one of those little seats to use for few weeks but even then she didn't want that after awhile.
Her sister preferred the potty chair because she's very tiny and the toilet swallows her whole. She's three now and I've finally had to put the potty chairs away and make her use a stool and the toilet seat to go potty. I got tired of finding surprises in the bathroom in the potty chair. Not good. :)
The 19 month old would rather just sit on the potty and hold on.
So you may need to try the chair, a little seat to put on the potty and so on. Every child is different.
Good luck!!!