Compare and contrast: 2.Small N designs with large N designs. In what circumstances would you use the within-subjects design and in what circumstances would you use the large N design? Just need 125 words.

Compare and contrast:
1.Between-subjects with within-subjects designs
2.Small N designs with large N designs.  In what circumstances would you use the within-subjects design and in what circumstances would you use the large N design? Just need 125 words.