I am trying to conduct a power analysis in g-power to determine a sample size for my honours thesis, but I don't know how to do so. I am planning on conducting a hierarchical, multiple logistic regression.

I am predicting men's identification as victims of female-perpetrated intimate partner violence based on their attitudes towards female dating violence, ambivalent sexist beliefs, precarious manhood beliefs, and the degree of battering they experienced. I am planning on controlling for the frequency and severity of the abuse by entering those predictors in step 1 of my hierarchical regression, before the entering the predictors previously listed. Based on my current study design, I believe I have six predictors (I'm assuming I include the predictors I'm controlling for?) and they are all continuous.

DV: Identification with intimate partner victimization (yes/no)

Predictors (Control) - enter step 1: severity of abuse, frequency of abuse

Predictors (IV) - enter step 2: attitudes towards female dating violence, ambivalent sexist beliefs, precarious manhood beliefs, degree of battering

I am not sure how to conduct a power analysis in g-power for a logistic regression, I know there is an option for it under z tests, but after that I'm lost in regards to what numbers to input into the various fields. In addition, I'm not sure if running this as a hierarchical regression has an effect on my power analysis.

If anyone has any information on how to conduct this analysis in g-power, I would greatly appreciate it, and if you need any other information from me, please let me know :)

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