Final answer:
In psychology, theories are often explained using abstract concepts known as constructs, which are critical for building testable hypotheses that help validate or refine those theories.
Step-by-step explanation:
In the field of psychology, theories are often expressed in terms of abstract concepts which are referred to as constructs. Constructs are used to describe elements of psychological theories that are not directly observable but are inferred from behavior and other phenomena. Examples of constructs include Piaget's stages of development or Freud's id, ego, and superego.
To test the validity of these constructs and their associated theories, researchers propose hypotheses, which are specific, testable predictions derived from the broader theory. When a hypothesis is repeatedly tested and supported through empirical evidence, it can contribute to the refinement and acceptance of the underlying theory.