Final answer:
The researchers' observation of homemakers in a model home constitutes an unstructured, contrived setting as it is an artificial environment with unstructured activities but is tailored for observation purposes.
Step-by-step explanation:
The observation of homemakers in a specially designed model home where they are monitored without their knowledge would be characterized as unstructured, contrived setting.
This is because the setting is created purposefully to study behavior, but the activities within it are not strictly controlled or guided by the researchers.
The presence of researchers posing as participants indicates a degree of deception, and the environment is not the participants' natural setting. Additionally, the behavior is being secretly recorded, which suggests a level of artificiality imposed on the situation.
This contrasts with naturalistic observation, which involves observing behavior in its natural setting without interference, or structured observation, which involves specific tasks in a controlled environment.