COMM 102 Lecture Notes - Lecture 5: Cohort Study, Longitudinal Study, Random Assignment

• School: U of M
• Department: Communication Studies
• Course: COMM 102
• Professor: Scott Campbell

Document Summary

Make the groups equivalent before their exposure to the treatment. In order to see whether the changes in the independent variable leads to corresponding changes in the dependent variable. Gives the researcher a lot of control. Everyone has an equal chance of being selected into a sample. In order to generalize results, the sample should look exactly like the population. Good for assessing pub op in the pop of interest. Surveying a single sample of some population at one time. Cannot say something is causal because you don"t know which variable comes first. You can see what thing comes first, allowing you to say something is causal. Surveying different groups of individuals at multiple times. Interviewing adult americans in 1980, 1990, 2000. With respect to their status in life or some other characteristic at the time of the survey. Uncovering changed occurring to a generational group over time. Surveying the same generational group at multiple times.