The phrase "are based on theory" is correct and usable in written English.
You can use it when discussing concepts, ideas, or practices that derive from theoretical frameworks or principles.
Example: "The findings of this research are based on theory, which provides a solid foundation for our conclusions."
Alternatives: "are grounded in theory" or "are founded on theoretical principles."
All candidates complete course-based assignments that are based on theory and best practices, and provide evidence that our candidates can apply the skills that they are taught.
This gap may be due to the fact that existing research typically has been designed to garner support for theory, as opposed to testing support for behavior change strategies that are based on theory.
They are based on theory and evidence related to audit and feedback, goal setting, complex adaptive systems, and empirical work on feeding back research results.
Reality has a way of making a mockery of political and social constructs that are based on theory.
Lewis-Beck argued that the "the best models are based on theory... things that we know [or] that we're pretty certain we know," which in this case means the belief that "people vote about the main direction of the economy, and they vote about big macro political issues," especially in midterm elections.
Usually, several competing models that are based on theory and/or empirical research are tested for good fit.
The intervention components are based on theory-based psychological concepts: risk perception and planning.
Those efforts are based on theories developed and applied for analysing timing properties of time-constraint concurrent software.
Psychological treatments are based on theories of personality, interpersonal communication, and learning.
Generally, the questionnaires are based on theories or existing questionnaires, often from a professional perspective.
By Piers Sellers August 17, 2016 Climate science is based on theory.
