Now, I'm really wondering...do you mean a third of your sampling will
have average IQs, a third will have below-average IQs and so forth?
Or do you mean this is a rule of thumb for the CP population as a
whole?   What exactly is your hypothesis?

When I was in grad school, the sampling had to be truly random, with
a control group to test it against.  Perhaps things have changed a
great deal in the social sciences since I was a MS candidate?

Kat


On 7 Jan 2006, at 23:00, greta von der luft wrote:

> OOPS I misspoke/typed. I meant kiddos with CP and average
> intelligence or kiddos with CP and mild cognitive impairment. I was
> trying to say that there was a range of intelligence....
>
> I know there is a rule of 1/3s. A third of the children with CP
> will have average intelligence, a 1/3 with mild cognitive
> impairment, and a 1/3 with severe cognitive impairment.
> Sorry,
> Greta
>   ----- Original Message -----
>   From: Brent Edwards<mailto:[log in to unmask]>
>   To: [log in to unmask]<mailto:C-
> [log in to unmask]>
>   Sent: Saturday, January 07, 2006 9:03 PM
>   Subject: Re: now greta's stats
>
>
>   Perhaps I missed something here. At least I hope I did. But did
> no one
>   else catch this?
>
>> I ended up with a good cross section of kiddos with CP (hemiplegic,
>> diplegic, quadriplegic; average to mild cognitive impairment...
>
>   ummm... What about some kids with no cognitive impairment at
> all?? Like
>   the kids that the people who post to this list grew up to be? Please
>   Greta forgive me if there is something about the way your
> research was
>   structured that precluded the use of data from cognitive normal
>   subjects. But if that is not the case, methinks I catch a whiff
> of the
>   old "all cp kids have cognitive impairment" meme. Those of us who
> are
>   not so impaired (who I'm guessing is just about everyone on this
> list
>   who has cp) aren't actually very fond of that piece of "conventional
>   wisdom".
>
>   Brent Edwards
>   Resident List Crank