Learning Objectives

6.1 Explain individual and group units of analysis and the role they play in the ecological and reductionist fallacies
6.2 Distinguish the three different longitudinal designs
6.3 Illustrate an example of a nomothetic and of an idiographic causal explanation
6.4 List the three criteria for establishing a nomothetic causal relationship
6.5 Recommend two cautions a researcher should keep in mind to improve understanding of a causal connection
6.6 Appraise the strengths and weaknesses of employing an experimental design as compared to other methods