If, after power analysis, a researcher's interventional study findings are nonsignificant, what might this imply?

Question

Quizplus · Accepted Answer

Nonsignificant findings after power analysis could imply that the effect size was smaller than expected (A), there were issues with the operational definitions of the independent (C) or dependent (D) variables, a Type II error occurred (F), or the intervention was not effective (G). These factors can contribute to the inability to detect a significant effect when one might exist or when the intervention does not produce the expected change.

If, After Power Analysis, a Researcher's Interventional Study Findings Are