Behavioral sciences use constructs such as conscientiousness, intelligence, political power, self-esteem, and group culture.
For example, if a student sees another sitting in a classroom before an examination biting her nails and fidgeting, the interpretation might be that she is experiencing anxiety.
[1] In that case, anxiety is a construct that underlies the behavior that is observed.
A construct derives its value from the shared meaning it represents for different people.
If a construct is clearly articulated and the phenomena it encompasses are clearly defined, it becomes a useful conceptual tool that facilitates communication.