Scientific experimental design – basic principles
How it works
Scientific experimental design is a structured process for systematically testing hypotheses. It includes formulating a testable question, developing a clear hypothesis, defining independent and dependent variables, controlling confounding factors (control variables), using a suitable comparison condition, and carefully documenting all steps. A control group is also often used for this purpose. The aim is to obtain objective and reproducible results. Good experimental design makes it possible to recognize cause-and-effect relationships more clearly and avoid incorrect conclusions.
A scientific experiment should include a testable hypothesis, clearly defined independent and dependent variables, controlled conditions, and a suitable comparison condition. Often this is a control group. This makes results more valid and more reproducible.
An example
Which of the following statements best describes the function of a control group in a biological experiment?
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50 Exercises
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: Biology. The topic assignment may vary by federal state.