Post Closed as "duplicate" by Robin Kramer, AliceD, Arnon Weinberg, Chris Rogers, Yvette Colomb of
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I'm currently designing an experiment with several conditions - how do I decide how many repetitions / stimuli within each condition?

I know that I can justify sample size with an a priori power analysis...is there any common way to choose how many trials within each of my conditions?

I was using sample size/power as an example of something where there is a particular approach to help decide.....what I am actually asking about is the number of trials i.e. if I have three conditions in my experiment, how many stimuli should I design for each of the conditions?

I'm currently designing an experiment with several conditions - how do I decide how many repetitions / stimuli within each condition?

I know that I can justify sample size with an a priori power analysis...is there any common way to choose how many trials within each of my conditions?

I'm currently designing an experiment with several conditions - how do I decide how many repetitions / stimuli within each condition?

I know that I can justify sample size with an a priori power analysis...is there any common way to choose how many trials within each of my conditions?

I was using sample size/power as an example of something where there is a particular approach to help decide.....what I am actually asking about is the number of trials i.e. if I have three conditions in my experiment, how many stimuli should I design for each of the conditions?

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How do you decide how many trials to have in an experiment?

I'm currently designing an experiment with several conditions - how do I decide how many repetitions / stimuli within each condition?

I know that I can justify sample size with an a priori power analysis...is there any common way to choose how many trials within each of my conditions?