Brain Size and use of what there is

There is an article in the Archaeology Magazine in July/August Issue called Footseps of Our Ancestors that is intriging to me. One of the things that is written about is the Size of the Brain pertains to how intelligent we are and the history of the Size pertaining to Intelligence. I wonder whether the Size has anything to do with what we do. It wonder if it is not the experience that an animal goes through. The reason this is brought to mind was several years Ago a large Cricket was in my basement on the top of a couch. It kept watching me and would back over the rear of the Couch. It was like a game of Hide and Seek. Finally when the cricket thought I was not looking go off the Couch and started running toward the Seward. I did catch it but the thought went through my mind in that it is not the Size of Brain but how it is used. Life is sure interesting if a person would sure use their eyes, ( the 5 senses) and go on in this world. Enough said Don