Bibliography (8):

1. https://osf.io/kmgx8/

2. https://www.personality-project.org/revelle/publications/websapa.final.pdf

3. The international cognitive ability resource: Development and initial validation of a public-domain measure

4. Wikipedia Bibliography:

   1. Flynn effect § Possible end of progression  :

      https://en.wikipedia.org/wiki/Flynn_effect#Possible_end_of_progression

   2. Flynn effect

   3. Intelligence quotient

   4. https://en.wikipedia.org/wiki/Open_source  :

      https://en.wikipedia.org/wiki/Open_source

   5. https://en.wikipedia.org/wiki/Matrix_reasoning  :

      https://en.wikipedia.org/wiki/Matrix_reasoning