Just to respond to a couple of these studies. The blacks who fathered the children in Germany had to take and pass an IQ test before fathering them! They were required to pass the Armed Services Aptitute Test, which is nothing more than an IQ test. So of course their children would be just as smart or almost as smart as the white children.
Not true.
There was no passing score for the GT test then and nor today. The score only qualified the soldier for a given set of Military Occupational Specialities or MOS. Whether you were drafted or allowed to volunteer depended upon not only your GT scores, but the scores on physical and psych evals and the local draft board.
In general, in WWII, blacks were not considered for any jobs other than services or quartermaster. It was only later in the War that blacks were allowed into other MOS, most notably the Infantry. From a careful reading of the history of the war, I cannot find any reference to a black man taking the GT test.
Any study which tests IQ, particularly in comparing between races, at the age of 4 is going to produce some pretty unreliable results. Black children tend to develop more quickly than European children (and Asians slower still). So of course blacks will have a much higher IQ in relation to whites at the age of 4 than they will at a later age.
While IQ will change over time for an individual, it is random, so age at 4 or 7 or 11 does not matter.
I'd like to see the cites for the assertion about development.
I doubt this for a number of reasons.
In general, a kid just gets smarter over time as knowledge accumulates. If any group were smarter, you would expect to see them raise to the top ranks faster.
Physical development is not linked to mental development.
If you have studies showing that black children raised in white homes have IQs equal to those of the white population, I congratulate you on finding them; but there are many more which show just the opposite.
Actually, their IQs are higher than the population they are raised in.
You have provided assertions, but nothing to back it up.
I do believe that through the equalization of opportunity and the adoption of better parenting methods the IQ gap can shrink, but it can't be eliminated.
If the Flynn Effect is constant over time across all groups, then there cannot be an IQ gap based upon genetics. The Flynn Effect tells us that eventually all groups will converge.
Consider this:
http://en.wikipedia.org/wiki/File:Blacktest_score_rise.jpg
http://en.wikipedia.org/wiki/Flynn_effect
