Theory
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A theory is a well-tested explanation that organizes many observations and generates new predictions.
Show
Classical conditioning organizes findings from dogs, infants, and chemotherapy patients, and predicts new results in each.
Watch for
In science, theory does not mean guess. A guess that has never been tested is a hypothesis at best.