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