[Solved] Taking a Broader Perspective: The Problem of External Validity All of these are examples of unobtrusive measures except A)comparing the condition of trails leading to natural park attractions to measure popularity. B)counting the number of cans along a highway to measure littering. C)randomly interviewing individuals at shopping mall to determine community attitudes towards pornography. D)recording eating behavior of obese and thin diners without their knowledge. Stereotype: A common, yet static and simplified perception or concept of a specific kind of individual or object. Internal Motive: An intrinsic drive or reason that prompts an individual to act or behave in a certain way, often linked to personal satisfaction or desire. Negative Stereotypes: Simplified and generally fixed perception of particular groups that is often unfavorable and incorrect. Externally Motivated: Driven by external rewards or pressures rather than personal interest or intrinsic desire.