Repeated-measures ANCOVA - Handle assumptions and missing data (SPSS)

[shannahw]

Hi all,

I am performing a repeated-measures ANCOVA in SPSS with following characteristics:

• Dependent variable: weight loss (with three points in time)
• Independent variable: conscientiousness
• Covariates: gender, age, depression

I can't find a good online guide that will take me step by step through this analysis. I particularly have questions about this:

1. Which assumptions do I need to check and how to handle violations?
2. In the measurement of the dependent variable from the second to the last point in time, I am missing 64 data points. How can I best handle this missing data?

I hope you guys can help me out. A reference to a good online source or video tutorial would also be extremely helpfull!

Thanks!

 

[Karabiner]

Your search string in a search engine could be
repeated-measures ANCOVA in SPSS step-by-step
or
repeated-measures ANCOVA in SPSS video
or
repeated-measures ANCOVA in SPSS tutorial

The first one for example leads to
https://statistics.laerd.com/spss-tutorials/two-way-ancova-using-spss-statistics.php

HTH

Karabiner

 

[shannahw]

Thank you for your answer. I found several tutorials, but none seem, in my opinion, to be thorough and step-by-step. I was hoping to lean a little on the experience here and find the best one immediately . I have been missing it in Andy Fields book, which I like. I will share of course if I have found the perfect one.

If anyone has a suggestion, still open for it! Thanks!