Chapter 9 is Cerebral Skills:
basically what parts of the mind does your game focus on, what can it teach and what else can you apply this knowledge to outside of the game.
I researched and made a big list of over 100 ways different games can focus on different skills and be educational in a fun way, even if the game was not intended to be educational but just entertaining.
Its a new thing I have been noticing listed on some games where it can be a fun way to improve things such as your organizational skills or pattern finding or memory or imagination or deductive reasoning etc. and it helps enhance the games purpose a bit in order to attract a wider audience.
This chapter ended up being bigger than i expected since there is such a wide verity of games that can be tied to skills in real life.Â