It is a subjective method to use for research. Maybe the change reflects a change in the readership of Playboy. Such studies often involve tens of thousands of individuals who are followed for several decades. Fig. Webarchival research disadvantages: o Biases present at data collection might influence conclusions o Does not tell us about cause and effect case studies: an in-depth study and detailed description of a single individual (or a very small group) learn about rare or unusual conditions Genie: Read the section on /*