The more I learn about IQ and psychology in general, the less and less respect I have for the testing and for the profession. The whole IQ testing controversy stems from one simple idea: Humans are gods and can (certainly deserve to) know exactly how intelligence works. As we have seen from the eugenics movement, this idea can have disastrous results. Nevertheless nature (pun totally intended) seems to have won again and keeps throwing us curveballs. Whenever humans "think" we've reached a conclusion, nature goes ahead and shows us a different result. No matter what we may do, there's always an alternative explanation or some other reason. Who knows, maybe there is a great big spot on the brain saying exactly this: "Yeah Right".
It seems that psychology is certainly treading on thin ice here. When an entire profession can't agree on what is important, or even what is considered to be right something is wrong. People will argue that this is the case with every scientific branch, occupation, or other aspect of life, but in my opinion, psychology is especially apt to be 'wishy-washy' giving no definitive answers. Just my personal opinion, but I have a hard time lending any credibility to something that is so ambiguous and undefinitive.