In an attempt to study police officers' attitudes toward their supervisors, alex surveys 25 police officers working during the day shift. in this scenario, what can alex ensure that his findings have external validity?

Me ! pretending that each option of a multiple choice question is actually a true-false question is a legitimate test taking strategy.true or false?

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

Which statement about spreading knowledge of diseases and health around the world is correct?