Define theory. Why are theories vital tools? How do theories differ from opinions or beliefs?

What will be an ideal response?

A theory is an orderly, integrated set of statements that describes, explains, and predicts behavior. Theories are vital tools for two reasons. First, they provide organizing frameworks for our observations of people, guiding and giving meaning to what we see. Second, theories that are verified by research provide a sound basis for practical action. Once a theory helps us understand development, we are in a much better position to know how to improve the welfare and treatment of children and adults. Theories are influenced by the cultural values and belief systems of their times. But theories differ from mere opinion or belief: A theory's continued existence depends on scientific verification. Every theory must be tested using a fair set of research procedures agreed on by the scientific community, and findings must endure, or be replicated over time.