Define the key terms

1. Covariation: a relationship between 2 or more IVs
2. Total effect size: the effect size for the effect of an IV measured on its own
3. Unique effect size: the effect size for an IV that is doesn’t share with any other IVs

Fill in the gaps 

1. In a route that is a sequence of steps, the direct effect sizes are multiplied together to give the effect size for the route.
2. When there are multiple routes between an IV and a DV, the route effect sizes are added together to give the total effect size.