How does anyone define "manic behaviour" especially in a really young child? From my own experience, when a Pervasive Developmental Disorder (PDD) kid gets excited about something he loves, what you can observe could be mistaken for mania.
Also with Pervasive Developmental Disorder (PDD), it can often overlap with ADHD and the hyperactivity component (if it's there) can again make a kid seem manic.
Younger kids often bouce off the walls when they're excited.
Pervasive Developmental Disorder (PDD) kids often get angry or depsressed because at some level, they feel different and find this upsetting especially when younger. Self-esteem is a problem you need to watch for.
My understanding of bipolar - mood swings form high to low FOR NO APPARENTLY VALID REASON. But you can get mood swings in ANYBODY, for valid reasons, at any time of life. But a Pervasive Developmental Disorder (PDD) kid - what is valid, is what is happening for them in their own minds.
Example (hypothetical) - a young Pervasive Developmental Disorder (PDD) kid who is obsessed with cars, especially matchbox cars. You are with that child and waiting at the doctor's surgery, the child finds a container of matchbox cars at the bottom of the waiting room toybox. The child spends the half hour wait lining up those cars and playing with rapt concentration, quietly. But that child's heart will be full of joy at the pleasure of being able to do his absolute favourite activity.
Then it's time to go into the surgery and the boy is made to leave the cars behind. No warning, no time to get himself used to the loss of the cars. He may be too young to understand that the cars are not his to keep. You will get the moter of all tantrums at this point, which is what the doctor sees. The doctor may have seen glimpses of the child sitting quietly and seemnig to be tranquil and calm; to the doctor (especially one who makes snap judgements) this will seem to fall into the bipolar category, especially if the parent reports similar findings at home - the child plays quietly but will suddenly rage spectacularly and without warning when the parents need the child to do something different. OK, the doctor has observed and there is also history... but Pervasive Developmental Disorder (PDD) will just as readily explain these observations. From the child's point of view, the mood swings have sound reasons.
A very young child is so difficult to diagnose unless you take a careful history and really work to get to know the child. We also tend to be geared towards a medication answer when it should never be more than a tool.
"OK, so what will we call it? If we call it ADHD, then we prescribe stims. OK, stimis caused a bad reacgtion, so let's try medications for bipolar." and so on.
There are no medications for Pervasive Developmental Disorder (PDD). However, my kids have responded well to ADHD medications for at least that aspect of their medical care. But it's very individual.
I know it's good to be able to use the (cheaper) school evaluations, but in my experience they are too superficial and perfunctory. A possible Pervasive Developmental Disorder (PDD) diagnosis (or BiPolar (BP) diagnosis) needs a really careful, meticulous assessment and frankly, schools aren't geared for this. However, any assessments done by the school an be used to kick-start a private assessment and maybe make the job a bit easier. It's never good to assess a kid too often because all that happens is, the kid gets good at doing IQ tests.
difficult child 3 a few years ago was part of a research project to develop more accurate methods of testing Pervasive Developmental Disorder (PDD) kids. They really are difficult to get a good measure of, they generally test below their true abilities. In that research project difficult child 3 was assessed as having an IQ in the mid-140s.
That's the other thing with IQ testing - above a certain score, or below a certain score (plus or minus 20) the accuracy goes out the window. I get annoyed with reports of "he has an IQ of 167" because it's a classic example of the difference between precision and accuracy. An IQ score of 167 is extremely precise, but the error bars are plus or minus 20 (or more) so technically, the score is meaningless. All you can say is, the person is brighter than most of the population at the time of testing.
That's why when I was at school and a teacher told us that all the kids in our class had IQ scores of over 120, that was as accurate as he could really say.
Outside certain score levels, IQ test score ranges are non-linear.
WHatever the diagnosis is, there can be a range of issues like an alphabet soup. Sensory Integration Disorder (SID), Obsessive Compulsive Disorder (OCD), ODD, ADHD etc. A lot of these will respond to individual therapy dealing specifically with that issue. These subissues can be part of a larger spectrum disorder. But you don't have to simply get a blanket diagnosis and then sit back and say, "My child has X Disorder, he is under treatment by Dr Y, so everything our son needs is being handled by Dr Y."
There is always more you can do, probably more you SHOULD do, for yourselves at home. You don't need to rely on experts to advise you (although good advice is always valuable) because YOU are the expert on your own child, regardless of whatever label the child is given.
Pervasive Developmental Disorder (PDD) kids, like a lot of difficult children, can have spectacular tantrums because teir level of frustration is very high plus their coping ability is often very low. They have a strong need to try to control their world and tihs can clash directly with a parent's need to direct and discpline their children. The more you try to assert your own control, the worse the ODD semblance becomes. Normal discipline methods (the ones which worked so brilliantly on your easy child kids) will often actively make these kids worse.
Different methods are called for, different thinking, different approach. But it comes down to what WE do as parents, to our own parental instincts.
Have faith in yourself as a parent. Your difficult child is not your fault. But you could be his salvation.
Marg
It's difficult to get a false high result, though. False low is much more likely and very possible.