Researchers have found that every addictive drug causes ________ levels in the brain to increase

Which of the following is a classic custom complex emphasized in Asian schooling?

a. wearing uniforms b. serving the same meal every day c. long school days d. high academic performance.

Recent evidence suggests that

A) most children show a steady rate of word learning that continues through the preschool years. B) toddlers undergo an initial spurt in vocabulary around 18 months. C) toddlers transition from a faster to a slower language learning pace around 18 months. D) most toddlers experience a decline in their ability to categorize experiences by the middle of the second year.