Intelligence is generally viewed as something that can be changed. If you believe this, you are more likely to try to improve your intelligence by learning more. However, if you view intelligence as something that is unchangeable, you are more likely to not try to change it, and your intelligence is unlikely to change.
This video introduces you to some of the early problems with intelligence tests and shows you the current method to assess intelligence with the Wechsler Adult Intelligence Scale (WAIS).
