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Answer :
Final answer:
Two critical factors in designing an experiment are the number of conditions created and their variability, as well as the number and representativeness of subjects recruited. These elements are essential for achieving valid and reliable results in research. Proper planning in these areas ensures that the experiment can effectively test hypotheses and yield meaningful data.
Explanation:
Factors in Experimental Design
When designing the conditions of an experiment, there are several critical factors to consider to ensure valid results. Two primary factors include:
- How many conditions to create and how widely they will vary: This determines how thorough your analysis will be. For example, if you are testing the effect of light on plant growth, you might choose to create several lighting conditions such as full sunlight, partial sunlight, and darkness, leading to a broader understanding of light's impact.
- How many subjects to recruit and how representative they should be: A sufficiently large and diverse sample size is crucial for generalizability. This could mean recruiting students from various backgrounds for a psychology study to ensure the findings apply more broadly across different demographics.
Additionally, ensuring that you control extraneous variables through random assignment and careful sampling can enhance the reliability of the experiment, allowing researchers to draw meaningful conclusions.
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