By age 6, children's vocabulary is about ____ words

A recent study involved 1- and 2-year-olds in a simple cooperative task. Which of the following accurately describes the findings of the study?

A. The 2-year-olds engaged in more actively cooperative behavior. B. The 1-year-olds engaged in more actively cooperative behavior. C. Both 1- and 2-year-olds engaged in actively cooperative behavior equally. D. Both 1- and 2-year-olds engaged in highly competitive behavior.

How do individuals with blood-injury-injection phobia differ from those with other phobias?

a. In their avoidance behavior b. In their physiological reaction c. In their familial history of the disorder d. Both b and c