Hey,
I would just like to mention that adding more participants and running the same analysis can inflate your false positive rate and you should therefore properly control your type 1 error if you are planning to do this.
There are quite a few papers out about this but if you wanna start with lighter read you can check these posts:
- on Daniel Lakens' blog: [
daniellakens.blogspot.com]
- on Kendrick Kay's blog: [
randomanalyses.blogspot.com]
Hope this helps.
Remi