Considering r2, is 15% a small, medium, or large effect?

Which of the following statements best summarizes the relationship between brain size and intelligence?

a. Brain size is a perfect predictor of intelligence-the larger the brain, the greater the intelligence. b. There is no relationship between brain size and intelligence whatsoever. c. Brain size and intelligence are related only in Caucasian people. d. There are modest correlations between brain size, convolutions of the cortex, and intelligence.

The Binet intelligence test measured children on what new concept?

a. divergent thinking b. mental set c. mental age d. creativity