The Effect Of An Independent Variable ( Iv ) Has On A Certain Dependent Variable

789 Words Dec 14th, 2014 4 Pages
An experiment is a test to study the effect an independent variable (IV) has on a certain dependent variable (DV). The classic experiment model is the most basic. First, all test subjects are “measured” and their initial opinion is recorded. Next, the test subjects are split evenly into two groups; a control group and the test group. The test group is given a “stimuli,” such as biased reading material on the topic at hand, whereas the control group is given more neutral, unbiased information on the same topic. After, all test subjects are “re-measured.” In theory, the opinions of the control group would remain static, where the opinion of the test group would measurably change, and the change could be contributed to the more biased information given as a stimulus. Other types of experiments become more complex; test subjects are not split into a test group and a control group; many more variables can be considered and more stimuli added, but the test still takes place inside a laboratory where the scientist has control over the stimuli. These types of experiments are considered quasi-experimental designs and include tests such as simulations and games. The most complex experiment is called a field experiment, it takes place in the real world and the scientist does not have control over all the factors and stimuli at play. (Van Thiel, 2014)
A survey is a method of using a questionnaire to collect data, usually of opinions, that is analyzed using statistical techniques. This…
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