Independent -- is what is varied during the experiment; it is what the investigator thinks will affect the dependent variable. In our coffee bean example, possible independent variables include: amount of fertilizer, type of fertilizer, temperature, amount of H 2 O, day length, all of these may affect the number of beans, weight of the plant, leaf area, etc.
Key : Since you need to know which factor is affecting the dependent variable s , there may be only one independent variable. The experimental constants or controlled variables are different from the control group.
The control group is an experimental group where the independent variable is not manipulated. In the above example, the group of seedlings left at normal room temperature would be the control group. What Is the Meaning of Variables in Research? What Is a Standardized Variable in Biology? What Part of the Plant Makes Seeds? Definitions of Control, Constant, Independent and Dependent Characteristics of Aquatic Plants. If height is the variable, its attribute might be 5 m, 2.
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