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www.merriam-webster.com/dictionary/theory

Theory definition is - a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena. How to use theory in a sentence. Two related, yet distinct, meanings of theory Synonym Discussion of theory.

www.amnh.org/exhibitions/darwin/evolution-today/what-is-a-theory

In everyday use, the word "theory" often means an untested hunch, or a guess without supporting evidence. But for scientists, a theory has nearly the opposite meaning. A theory is a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts. The ...

faculty.jou.ufl.edu/mleslie/spring96/theory.html

Theory explains how some aspect of human behavior or performance is organized. It thus enables us to make predictions about that behavior. The components of theory are concepts (ideally well defined) and principles. A concept is a symbolic representation of an actual thing - tree, chair, table, computer, distance, etc.

www.dictionary.com/browse/theory

Theory definition, a coherent group of tested general propositions, commonly regarded as correct, that can be used as principles of explanation and prediction for a class of phenomena: Einstein's theory of relativity. See more.

en.wikipedia.org/wiki/Theory

A theory is underdetermined (also called indeterminacy of data to theory) if a rival, inconsistent theory is at least as consistent with the evidence. Underdetermination is an epistemological issue about the relation of evidence to conclusions. A theory that lacks supporting evidence is generally, more properly, referred to as a hypothesis.

www.livescience.com/21491-what-is-a-scientific-theory-definition-of-theory.html

A scientific theory is a specific type of theory used in the scientific method. The term "theory" can mean something different, depending on whom you ask. "The way that scientists use the word ...

www.thefreedictionary.com/theory

Define theory. theory synonyms, theory pronunciation, theory translation, English dictionary definition of theory. n. pl. the·o·ries 1. A set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or...

www.skillsyouneed.com/learn/theory.html

As well as describing theory the page gives a brief introduction to the steps involved in the construction of theory, in an academic or scientific context. A theory is a method we use to give us understanding. One of the major purposes of a theory is to provide an answer to the question ‘why ...

www.businessdictionary.com/definition/theory.html

Definition of theory: A set of assumptions, propositions, or accepted facts that attempts to provide a plausible or rational explanation of cause-and-effect (causal) relationships among a group of observed phenomenon. The ...

www.esourceresearch.org/eSourceBook/SocialandBehavioralTheories/3TheoryandWhyItis...

Theories vary in the extent to which they have been conceptually developed and empirically tested; however, “testability” is an important feature of a theory. As Stephen Turner has noted in his chapter on “Theory Development,” social science theories are better understood as models that work in a limited range of settings, rather than ...