Original sentence: Two studies exist in which modeling by itself did not increase prosocial behavior ; however, modeling is much more effective then instruction giving such as "preaching" The role of rewards has been implicated in the building of self-control and empathy
Edited sentence: Two studies exist in which modeling by itself did not increase prosocial behavior ; however, modeling is much more effective than instruction giving such as "preaching" The role of rewards has been implicated in the building of self-control and empathy