<br> <br><br><br>On Thu, Jan 20, 2011 at 5:59 AM, Yioryos Asprobounitis <<a href="mailto:mavrothal@yahoo.com">mavrothal@yahoo.com</a>> wrote:<br>><br>> The study involved <br>> "149 (American) preschoolers (mean age: 60 months, range:<br>
> 48–72 months) (that) were recruited in a metropolitan<br>> Science Museum. Most children were white and middleclass,<br>> but a range of ethnicities resembling the diversity of<br>> the population was represented".<br>
<br>This does not describe a meaningful population for such a study. There are huge differences, for example, between "home-grown kids" and "institution-grown kids" that can both come from middle-class families.<br>
<br clear="all">Cheers,<br>Maria Droujkova<br><br>Make math your own, to make your own math.<br><br>