Evaluate Advertising Effectiveness with Observational Methods By Facebook Blueprint Published: Nov 4, 2019 Duration 13m Difficulty Intermediate Average rating: 4.5 6 6 reviews In this course, you'll learn about common types of observational studies, their uses and limitations. LESSONS Introduction to Observational Methods 3 m Common Types of Observational Methods 4 m Observational Versus Experimental Methods, a Comparison 3 m Limitations of Observational Methods 2 m