Reference no: EM133483807

The independent variable is the experimental or predictor variable, an example is a persons age, you cannot change someone age but what can be changed is their lifestyle such as diets and activities. The independent variable is often changed in the research to see what the effect on the dependent variable is (GCU, 2022). The dependent variable is the outcome variable. It brings on various standards in response to the independent variable. The extraneous variable is said to be a variable that can impact the relationship between the independent and dependent variables which can be controlled either through research design or statistics that were not anticipated or recognized at the beginning of the study (Grand Canyon University ,2022).

Experimental design is one-way to control extraneous variables this is done by designing an experiment in which individuals are randomly assigned to treatment groups and such that researchers are also blind to which persons belong to which group, this should diminish the problem of experimental favoritism (Zach, 2021). According to Zach, 2021 Having a stable unchanged environment is another way to control extraneous variables. Every person should be able to participate in an experiment in the specific same environment, examples such as the same lighting, same noise levels, same temperature, and same number of outside distractions. This should minimize the effect of situational variables and stress attributes.