If a Researcher Conducting an Observational Study of People at a Shopping

Multiple Choice

If a researcher conducting an observational study of people at a shopping mall is making use of an unobtrusive measure, which of the following will he NOT have to worry about?

A) Potential experimenter expectancy effects contaminating his observations.
B) Using operational definitions to define the variables in which he is interested.
C) The generalizability of the findings from his study.
D) The people in the mall changing their behaviour because they know they are being watched.