A concept is a general idea or understanding of something, often based on observation or experience. It is a mental representation of a category or class of objects, events, or phenomena.
A construct, on the other hand, is a specific concept that is created or defined for a particular purpose, often in the context of research or theory development. Constructs are often used in psychology, sociology, and other social sciences to represent abstract ideas or theoretical concepts that cannot be directly observed or measured.
In summary, a concept is a general idea or understanding, while a construct is a specific concept that is defined for a particular purpose, often in the context of research or theory development.