experiments w more than 2 groups

Question 1

types of correlated groups:

Answer 1

matched pairs, repeated measures, natural pairs

Question 2

3 reasons why we conduct experiments with correlated groups

Answer 2

1. reduces number of participants you need
2. provides more control
3. reduces error variability, more likely to achieve statistically significant results

Question 3

3 reasons why we conduct an experiment with independent groups

Answer 3

1. randomizing is very simple
2. missing data is less likely
3. sometimes its not possible to use correlated groups