According to many studies, there is a positive correlation between cross-group contact and good attitudes about people in the "other" group. this positive correlation means that as contact between groups increases, good attitudes about people in the other group should

increase

Explanation:

When a group of people has contact with persons who have good vibes, are positive speakers and form a friendly atmosphere, it's more probable that in a short-time will influence the behavior of the rest of the group. That will change the temper and feelings of the group, and increase the good actions.