Re: DAFNgapz Unchanged - No Surprize

From: EKurtz (NoJunk_at_ForgetIt.com)
Date: 09/07/04 

Date: Mon, 6 Sep 2004 21:02:24 -0400

"MIB529" <man_in_black529@yahoo.com> wrote >

Black/white IQ gap in major IQ tests
>
> Ravens Standard Progressive Matrices 7 points
> Kaufman Assessment Battery for Children 7
> Stanford-Binet IV (two separate studies) 10
>
> 1. K.R. Vincent, "Black/white IQ differences: Does age make a difference?"
> Journal of Clinical Psychology 47, 1991, pp. 266-270.

This is the gap in *children* and in only *one* 13 year old study.

QUOTE
J Clin Psychol. 1991 Mar;47(2):266-70.
Black/white IQ differences: does age make the difference?
Vincent KR.
University of Houston, TX.

Data are presented on racial differences from the norms of the Kaufman
Assessment Battery for Children, the recent renorming of the Wechsler Adult
Intelligence Scale-Revised, the Stanford-Binet IV, and Raven's Progressive
Matrices. The premise of the present article is that, while the one standard
deviation IQ difference between Black and White adults has remained
constant, IQ differences between Black and White children are declining.
These data are discussed in the context of previous studies on possible
racial bias of IQ tests, as well as marked changes in educational and
economic opportunities that have occurred in the United States in the
decades since Jensen's (1969) article.
END QUOTE

"the one standard deviation [ie 15 point] IQ difference between Black and
White adults has remained constant"

The national B/W IQ gap is an extremely well studied subject. If the
national IQ gap for *adults* had dropped from 15 to 7 or 10 points we would
surely have heard about it. Jensen, in "The g Factor", published 1998, gives
a gap of 15 for adults (though he mentions that the gap for children is 0.7
sigma, close to Vincent's result). So far as I know, that figure has not
been challenged.

> Seriously, a gap of 30 points would be absurd. That would require
> all blacks be retarded.

You mean all African blacks; not true; since IQ is normally distributed, and
the usual threshold for retardation is 70, only half would be retarded.

QUOTE
But can that African 70 average IQ be real? It is indeed extremely low, the
lowest found in any comparable area. This has caused many to dismiss the
finding.
I know that the figure is not a fluke, however, because for the last six
years I have collected African IQ data on hundreds of students at the
prestigious University of the Witwatersrand in Johannesburg, South Africa.
The average IQ for these African students turns out to be 84. Assuming they
score 15 points above the general average, as university students of any
group typically do, then an average African IQ of 70 is implied-exactly what
the direct measurements show.
END QUOTE
http://www.vdare.com/misc/rushton_iq_conundrum.htm

I have to say that, despite what Rushton says, 70 does seem awfully low.
But it is nevertheless a fact that no African state has achieved the
stability and affluence of even the poorest Western European state; it is a
fact that Africa has made no contribution whatever to science and
technology; it is a fact that the world center of HIV is Africa; it is a
fact that some African states face demographic collapse because of AIDS
mortality. It is a fact that HIV infection is entirely preventable, and it
is surely a fact that, knowing what we now know, you would have to be
profoundly stupid to engage in behaviors that expose you to it.

Relevant Pages

  • Re: Running apes Re: Naked Ape?
    ... > More a gap in my memory. ... not African. ... are almost ideal prey. ... Wouldn't surprise me to learn we look pretty ...
    (talk.origins)
  • Re: Terrorism?
    ... Standard or Large? ... African or European? ... BOF#30 WUSS#5 The bells, the bells..... ...
    (uk.rec.motorcycles)