Massachusetts Tests for Educator Licensure (MTEL) Practice Test

What method can improve the reliability of results in scientific investigations?

1. Using larger sample sizes

2. Documenting the weather conditions

3. Repeating experiments multiple times

4. Minimizing the time of each experiment

The correct answer is: Repeating experiments multiple times

The option that enhances the reliability of results in scientific investigations is the practice of repeating experiments multiple times. This method allows researchers to determine whether their findings are consistent across different trials. By conducting the same experiment under the same conditions, any variations in results can be identified, and this helps to confirm the validity of the initial findings. If the repeated trials yield similar results, it increases confidence in the reliability of the data and the conclusions drawn from it. Repeating experiments also helps to identify any anomalies or outlier data points that may have occurred due to random chance or experimental error, thus allowing researchers to refine their methods. Overall, the repetition of experiments plays a crucial role in reinforcing the robustness and trustworthiness of scientific findings, ultimately leading to more reliable conclusions.