Readers will know that I sometimes toy with the idea of writing a “Boost your IQ” book, which will also have an associated training course, expensive test materials, and very possibly lengthy seminars in international beach resorts. Trouble is, one would have to write the damn thing.
Then, whilst going through Linda Gottfredson’s website on another matter, I remembered she had written a very good “Instant Expert” piece in 2011 for the New Scientist, which covers all the main findings: the different types of intelligence; what intelligence tests measure; what is intelligence; quantifying intelligence; age effects; brain localisation; what makes someone smart; nature and nurture; realising your assets; simplifying your world; boosting brainpower (YES); cognitive enhancement; and are we getting smarter.
This publication is guaranteed to boost your intelligence, so long as you accept that increasing your knowledge might count as boosting your crystallized intelligence. What is more, it is freely available on her website. I understand that, on the basis of effort justification, you would like to pay a large sum of money and do N-back training for 20 hours, but why not take the intelligent short cut, and spend 20 minutes reading it, and then send it to a colleague who claims not to understand the concept?