How would officials have taken a census of china’s population

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?

What period of history refers to the time when people did not have written records

What did populists set their sights on after achieving some success on a local level in the late 1800s?