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The components needed in order for an experiment to be valid is a hypothesis, a control, and variables. The contol woud be the plant food because it remains constant throughout the experiment and the variables would be the two different plants that the scientists are testing the new plant food on.
- Definition
- Example
- Terminology
- Applications
A control is a standard or a group of standards that the other experimental groups are compared to. It is a metric used to determine whether results are positive are negative due to the experiment. For example, in an experiment testing the effectiveness of a weight-loss drug, there are ideally two identical groups. One group, the experimental group...
The experimenter also controls an independent variable. It is the treatment and how it is administered. Using the same example of a weight-loss drug experiment, an independent variable would be the dosage of the drug that the different groups receive. The results of the different groups could then be compared to determine whether the dosage affects...
The dependent variable is also known as the response variable. This variable changes in response to the changes in the independent variable. In the weight-loss drug example, the dependent variable would be how much weight the different groups lose.
A constant is something that does not change across all of the experimental groups. These are used to minimize the effects of components other than the independent variable. In the weight-loss drug experiment, constants could include the groups' genders, initial weight or height. These components might affect the results of the trial. Holding them ...
Sep 26, 2017 · Repeatability and Reproducibility. A valid experiment is repeatable; when you repeat your experiment, it should yield the same results. It is also reproducible. Someone else should be able to perform your experiment and get the same results. If other scientists get different results, then you have overlooked one or more important parts of your ...
Part 3 – Reliability. Science experiments are an essential part of high school education, helping students understand key concepts and develop critical thinking skills. However, the value of an experiment lies in its validity, accuracy, and reliability. Let's break down these terms and explore how they can be improved and reduced, using ...
Sep 6, 2019 · To produce valid results, the content of a test, survey or measurement method must cover all relevant parts of the subject it aims to measure. If some aspects are missing from the measurement (or if irrelevant aspects are included), the validity is threatened and the research is likely suffering from omitted variable bias.
- Face validity and content validity are similar in that they both evaluate how suitable the content of a test is. The difference is that face validi...
- Criterion validity evaluates how well a test measures the outcome it was designed to measure. An outcome can be, for example, the onset of a diseas...
- Convergent validity and discriminant validity are both subtypes of construct validity . Together, they help you evaluate whether a test measures th...
- The purpose of theory-testing mode is to find evidence in order to disprove, refine, or support a theory. As such, generalizability is not the aim...
- It’s often best to ask a variety of people to review your measurements. You can ask experts, such as other researchers, or laypeople, such as poten...
Dec 3, 2019 · Table of contents. Step 1: Define your variables. Step 2: Write your hypothesis. Step 3: Design your experimental treatments. Step 4: Assign your subjects to treatment groups. Step 5: Measure your dependent variable. Other interesting articles. Frequently asked questions about experiments.
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5 Components of a Well-Designed Scientific Experiment. Whether in middle school or a laboratory at NASA, the scientific method is the accepted approach for conducting an experiment. The five components of the scientific method are: observations, questions, hypothesis, methods and results. Following the scientific method procedure not only ...
