2 IV's: Pregnant/Non Pregnant & Physically Active/Not Physically Active
1 DV: Cognitive Functioning (Inhibition - SSRT scores)
AIM: Investigate whether there is a difference in physical activity levels are present between Preg/Non Preg & if this has an effect on cognitive functioning.
Preg will not meet physical activity levels and will have lower cognitive functioning scores compared to non-preg
Preg will show no difference in cognitive functioning tasks/reaction time compared to non preg when Physical Activity is controlled for.
Okay, so STATs-wise. I am in need of some guidance around how to go about calculating power and effect size for my final research topic.
I believe that this particular research requires multiple regression. But am unsure what statistics to analyse the difference.
Do I need to look at moderation/mediation for Physical activity being an influencing variable?
How do I go about computing power and effect size? I am trying to figure out the sample size using power calculation through the use of G*power.
Would the statistical test be: linear multiple regression: fixed model, R2 increase
Would effect size f2 be 0.15 a err prop 0.05 and power 0.95, would my number of predictors be 4?
Am I on the right track :( Need some guidance