A parent records how loudly her child screams. The parent is recording the ____________ of the screams

Peter notices that his research assistants are less reliable in their observational coding efforts

than they were several months ago. Which validity threat best captures this situation? A) reactivity B) maturation C) instrumentation D) testing

Approximately one-third of U.S. young people with a high school diploma

A) drop out of college. B) attend a technical school. C) have no current plans to go to college. D) leave the country to study abroad.