Ctesibius is credited with having invented the first organ in 1853

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?

Explain what commentary austen is making about social conversation based on this excerpt. your answer should be at least 150 words.

What was the greatest contribution of the “scientific method”?