Hypothetical constructs are abstract concepts that are not directly observable but are used to explain behaviors or phenomena. Examples include intelligence, motivation, and anxiety. Researchers create these constructs to help understand complex human experiences and to develop theories that can be tested through observation and experimentation. These constructs often serve as the foundation for psychological theories and assessments. For instance, a psychologist might measure anxiety through questionnaires, even though anxiety itself cannot be seen. By using hypothetical constructs, scientists can better analyze and interpret data related to human behavior and mental processes.