's' factor refers to specific abilities that are secondary and unique to all individuals. General intelligence, also known as g factor, refers to the existence of a broad mental capacity that influences performance on cognitive ability measures
~25 years ago a phycology professor and and genetics professor drove to my house to give me an IQ test and take blood sample.
They were looking for a bad spelling gene.
I have it.
My grandmother immigrated from Sweden 120 years ago. Most of her male decedents are engineers with bad spelling and a drinking problem.
As bad as my spelling is, there have been much worse lately on the fire.
