Recently I am conducting a research on the relationship between motivation/attitude variables (Gardner's model) and English language proficiency in the Philippines. I encountered a problem: missing ...
Appropriateness of calculating scale means based on available non-missing responses (i.e., person-mean imputation)
This question came up in a consulting context, and I was interested in your thoughts. Context One strategy for dealing with occasional missing data when calculating scale means looks like this in ...
I was recently consulting a researcher in the following situation. Context: data were collected over four years at around 50 participants per year (participants had a specific diagnosed clinical ...