Experimental Design Diagram (EDD) is a diagram used in science to design an experiment. This diagram helps to identify the essential components of an experiment. It includes a title, the research hypothesis and null hypothesis, the independent variable, the levels of the independent variable, the number of trials, the dependent variable, the operational definition of the dependent variable and the constants.[1]

References

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    TitleThe Effect of Different-Aged Compost on Bean Growth
    HypothesisIf older compost is applied, then plant growth will be increased, because....
    Independent VariableAge of Compost
    Levels of IV3-month-old Compost6-month-old compostNo compost
    Repeated Trials25 plants25 plants25 plants
    Dependent VariableHeight of Plants (cm)
    ConstantsAmount of light; Amount of water; Amount of compost
    Students and Research: Practical Strategies for Science Classrooms and Competitions, 3rd Edition, by Cothron, Giese, & Rezba (2000). Kendall/Hunt Publishing


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