Recently I've found it to be highly taboo to talk about IQ score differences between races. Wikipedia states that race is a social construct so such differences cannot exist. But we all see physical differences and test scores clearly demonstrate a difference in IQs.
I have sources for this graph, does anyone have any contradicting sources?
For example if adopted children have the same IQ score as their parents to show that IQ is more of a social construct?
To what extent do you think IQ is social verses genetic?
Tell you right now, they can pass :P
In saying that, I am indicating that there is more to how someone passes a PhD program.
Back to the point though, lets say in theory this is true (it's not but whatevs), and someone had a low IQ on a particular snapshot, there are multiple factors here such as: When it was made, how someone conducted themselves in that test (how much preparation was involved), their reading ability (let alone comprehension), educational background, discipline, knowledge, health and etc. Best this does, is provide a qualitative feedback.
However, why stop at ethnicity as an indicator for intelligence? We could retrieve similar data where people from rural areas typically have a lower IQ than those in city areas? Does this mean that city people, being ethnically similar to rural people are just superior? Of course not!
Same comparison can be made on wealth lines. A justification that aristocrats have used in the past which we can see is bullshit :)
So,
A snapshot doesn't really show that someone is 'incapable' of obtaining a PhD but that the situation at the time may indicate that they may not be able to obtain it within a particular time frame.
It is very much dependent on the field of academia they are in, but hey... I see researchers publish shit all the time so... y'know.
The PhD situation is likely to have its own challenges involved, not all PhD programs are made equal and not all problems are made equal.
To conclude:
There are far too many factors involved to use IQ as a serious quantitative measurement. To suggests that all IQ tests are conducted in a fair environment and conclude that it is a direct measure of racial intellectual performance is a joke. (I'd agree that the researchers probably have given it their best but realistically it isn't enough. It amounts to getting a report card from school saying that you are either not studying enough or you're doing well, what you do with that information is your choice).