So I finished conducting a study. Before I started data collection, I did a power analysis to make sure how many subjects I would need to collect to find an effect (using G*Power).
Now that I had a look at the data, no expected results were found (highly insignificant). My supervisor asked me to calculate the power of my results to see if we were underpowered or not. Is this possible to do? And if so, how? (e.g. for repeated and mixed ANOVAs). I myself am however skeptical if it makes sense or not (read The Abuse of Power: The Pervasive Fallacy of Power Calculations for Data Analysis by Hoenig and Heisey). Am I misinterpreting something? What are your perspectives?
Please let me know if you need more details on the study to understand my question!