Many of the apparent differences between firstborn and later-born children are really due to differences between small and large families

Which of the following is true of executive function?

It consists of a number of low-level cognitive processes. It shows considerable increase in late adulthood and is strongly linked to increase in working memory. It is unrelated to health, emotion regulation, and social functioning. It involves managing one's thoughts to engage in goal-directed behavior and to exercise self-control.

Which of the following statements about fluid intelligence is true?

It is the accumulation of facts. It is quick and flexible. It includes long-term memory for dates in history. It includes the size of one's vocabulary.