If an experiment suffers from lack of____________, the experiment may appear to show that the null hypothesis is supported, when in reality, it should be rejected.
A) External validity
B) Power
C) Ecological validity
D) Reliability

Question

Quizplus · Accepted Answer

Lack of power means that the sample size is too small or the effect size is too weak to detect a significant difference between the groups. This can lead to a false negative result, where the null hypothesis is not rejected even though it should be. Therefore, the experiment may appear to show that the null hypothesis is supported when it is not. External validity refers to the generalizability of the results, ecological validity refers to the extent to which the study mirrors real-life situations, and reliability refers to the consistency and reproducibility of the findings. While these factors are important, lack of power is the most relevant in this case.

If an Experiment Suffers from Lack Of____________, the Experiment May