The transition to young adulthood was traditionally marked by the age when people were married, entered parenthood, and started stable work. Around what age does this happen for most people today who live in developed countries?

Using research results to solve practical problems is an example of the goal of ____

a) prediction. b) influence. c) explanation. d) replication.

A detailed description of a particular individual being studied or treated is called _____

a) a representative sample. b) a case study. c) a single-blind study. d) a naturalistic observation.