Which group of soldiers attended an officer's training school in des moines, iowa, during world war i?

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 occurred during the free banking era? the dollar bill was introduced. the second bank of the united states was established. repaying of loans was not closely monitored. currency varied widely from state to state.

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