> This isn't true at all. They haven't been shown to be biased, merely that blacks score lower. Extensive research has show that IQ tests have equal predictive power for blacks and whites.
I think you illustrate the danger of making assertions without being entirely informed - that is to say that what you state here is the beginning of the truth, but taken out of context. There was (and in many cases still is) a heavy cultural bias built into standardized IQ testing. Traditionally, most tests were developed and tested against middle-income, white children. Black children traditionally tested one standard deviation below their white counterparts, even when controlling for income, etc. However, many experts agree that this is due to cultural bias and environmental factors, agravated by the strong corelation between income and where you live geographically in the US, including resources (or lack thereof) in corresponding school districts. Example: children in troubled, inner-city schools would often have less access to rigourous IQ testing when compared to their urban, middle-class counterparts.
There is also the complicating factor of single-parent or broken homes and the roll that plays in a child's lack of overall intellectual development. This also correlates to income and geographic area (i.e. innercity versus urban environment).
> I've never understood why eliminating one of the few objective measures and making the hiring process entirely subjective was an improvement.
That's another subject and worth talking about. I'm simply stating that you should be very careful when talking about the black-white gap in IQ scores. There are too many factors at play to make a clear case for IQ differences between races.
For an informative article with really enlightening references, see this: http://theafrican.com/Magazine/IQ.htm