not required specific topic

Extraneous variables may influence the dependent variable. In what ways do researchers attempt to control extraneous variables? Support your answer with the current literature.
Extraneous variables are other variables that remain excluded from the independent or dependent variables. They are often undesirable and influence the relationship between the variables that are being tested, therefore, affecting the overall outcome of the experiment. There are several types of confounding variables which include situational variables for instance noise and environmental temperature. Participant variables include previous knowledge or a personal characteristic that could influence the results. Researchers control extraneous variables through standardized procedures and random assignment methods CITATION Ken16 l 1033 (Cherry, 2016). Standardized procedures involve choosing the independent and dependent variables in the same conditions as possible to enable unbiased feedback. Random experiments include giving the variables equal chances to stay assigned and utilized in the investigation. The method reduces the likelihood of using personal decisions to choose the participants in the experiment CITATION Ken16 l 1033 (Cherry, 2016). Some extraneous variables are difficult to observe. Therefore, many types of research imply statistical techniques to control the variables.
Most researchers use the random assignment methods during their studies as it not only eliminates extraneous variables but also gives all the groups an equal chance to participate CITATION Ste15 l 1033 (Kramer, 2015).

For instance, a researcher conducts a study in a driving school to determine if various tests improve their performance during practices. One extraneous variable might include prior knowledge of the questions and also the methods. To avoid this, the researcher might choose the participants through administering questionnaires where they will answer several questions that will determine the level of knowledge. Furthermore, the researcher will, therefore, select the variables from analyzing the polls which include the prior experience of the study. The confounding variable will not be able to affect the variables and hence the final results. That enables the outcomes to remain more reliable.

References
BIBLIOGRAPHY l 1033 Cherry K. (2016, September 6). What Is an Extraneous Variable? Retrieved from www.explorepsychology.com: https://www.explorepsychology.com/what-is-an-extraneous-variable/
Kramer S. (2015, May 10). Extraneous Variable Simple Definition. Retrieved from www.statisticshowto.com: http://www.statisticshowto.com/extraneous-variable/