Hello All,
I am having some difficulty trying to calculate the power and to also determine an adequate sample size for a study looking to determine the the construct, convergent and divergent validity of a scale survey. I came across a research paper by Anthione et al "Sample size used to validate a scale: a review of publications on newly-developed patient reported outcomes measures" and unfortunately they also did not provide any specific methods.
We have 110 initial items in our survey to be administered to n=250 participants to examine the survey's psychometric properties. In particular, I need to justify why n=250 has adequate power given we have 110 items in our survey. Any comments will be appreciated!
Cheers!
I am having some difficulty trying to calculate the power and to also determine an adequate sample size for a study looking to determine the the construct, convergent and divergent validity of a scale survey. I came across a research paper by Anthione et al "Sample size used to validate a scale: a review of publications on newly-developed patient reported outcomes measures" and unfortunately they also did not provide any specific methods.
We have 110 initial items in our survey to be administered to n=250 participants to examine the survey's psychometric properties. In particular, I need to justify why n=250 has adequate power given we have 110 items in our survey. Any comments will be appreciated!
Cheers!
