which variables affect the performance of a dependent variable what variables affect the performance on repeatable measures? what measures affects digit span can mood influence the digit span why is it important to use ancvara what is racva used for in r? what is the relationship between environment and performance why would you use ancova in r what does a digit span test for what r measures mood which variable is affected on the reverse digit span task does environment affect digit span how to test mood and environment in r can assessment of environment affect performance on task what variables affect a dependent variable why does environment affect digit span? why do organisms perform better on span how do i find out if environment affects my data in r why do organisms perform better on reverse digit span what type of variables are measured by an acva test?