Week 5, Discussion 1: Experimental versus Quasi-Experimental Designs Discuss the major differences between experimental & quasi-experimental designs. Be sure to address the relationship of variable manipulation to each of these designs & discuss the different types of manipulations that may be used. What dictates the design (experimental versus quasi-experimental) & the type of manipulation used in a research study?

There are three features to an experiment: 1. manipulating the variable, 2. Controlling the environment, & 3. Assigning people to groups (Newman, 2011). Researchers must manipulate or change some key variables. In order to do this you must have at least two versions of the variable. There are three ways to manipulate a variable. The first, environmental manipulations,...