> The Flynn effect says we're gaining an avg of 3 IQ pts every decade since the early 20th century. Meaning our great grandparents, on average, would be conside

> The Flynn effect says we're gaining an avg of 3 IQ pts every decade since the early 20th century. Meaning our great grandparents, on average, would be considered mentally handicapped compared to today's intellect. According to Flynn's later work[0], this gain might be explained by: > The Dutch data proved the existence of unknown environmental factors so potent that they account for 15 of the 20 points gained. The hypothesis that best fits the results is that IQ tests do not measure intelligence but rather a correlate with a weak causal link to intelligence. This hypothesis can also explain difficult trends on various mental tests, such as the combination of IQ gains and Scholastic Aptitude Test losses in the United States.[0] > do our brains act like muscle and the info age as a super gym? I'm not quite sure what you mean by "age as a super gym", but cognitive functions can be increased, much like how exercising strengthens the muscles used. Some research supports earlier introduction to abstract concepts contributes to increased fluid intelligence. Other research posits nutrition might be a contributing factor. It would not be unreasonable to think both contribute to some degree. As far as "brain hacking" goes, there is research supporting increasing fluid intelligence via far-transfer cognitive training (working memory, set switching, sustained focus, etc.). It also is hypothesized that these cognitive training tasks contribute to near-transfer benefits. EDIT: corrected cognitive training enumeration. 0 - https://psycnet.apa.org/record/1987-17534-001 https://psycnet.apa.org/record/1987-17534-001