The phrase "intelligence level" refers to how smart or clever someone is. It describes a person's ability to understand and solve problems, learn new information, and think critically. Full definition
But would we be shocked to find that the average intelligence level of such a classroom is lower than a classroom in an elite, affluent suburb? (educationnext.org)
These working dogs have an athletic body, are very resilient in harsh weather conditions and have an above average intelligence level. (thedogsavenue.com)
People of lesser intelligence levels will tend to be more religious. (religion.blogs.cnn.com)