Link to the study linked in the article (PubMed prepublication abstract):

http://www.ncbi.nlm.nih.gov/pubmed?term=west%20stanovich%20m...

The psychologist Keith R. Stanovich is quite controversial among other psychologists precisely because he writes about what high-IQ people miss in their thinking, but his studies point to very thought-provoking data and deserve to be grappled with by other psychologists. I have enjoyed his full-length book What Intelligence Tests Miss

http://yalepress.yale.edu/YupBooks//book.asp?isbn=9780300123...

which meticulously cites much of the previous literature on human cognitive biases and other gaps in rationality of human thinking.

And here is the submitted article's link to a description of the Need for Cognition Scale:

http://www.liberalarts.wabash.edu/ncs/