Fourteen-year-old Jessica can see distance objects very clearly, but the words in the textbook she is reading appear blurry. She most likely has which visual problem?

Differences between individuals who were born and grew up at different times are known as ________

a) cross-sectional effects b) reference groups c) cohort effects d) cognitive differences

What is the meaning of the term "crowd" in relation to the adolescent peer group?

a. A small group of 5 to 10 friends b. All the people one adolescent knows by name c. A large group recognized by a few predominant characteristics d. All the popular kids in a school