This time everyone votes in favor of changing the schedule so they can watch the World Series, going against the conformity of Nurse Ratched. We are lead to believe that because of McMurphy's actions and words from the night before the patients of the ward somehow change, or grow.
There are many different ways that McMurphy's nonconformist behavior helped people on a personal level, one being Cheswick. At the beginning of the movie he has little self-esteem. Instead of speaking for himself he merely mirrors what others say or plays "follow the leader", first with Harding then with McMurphy. The turning point for Cheswick is on the boat. McMurphy makes Cheswick drive the boat against his will. This is the first time Cheswick is in control or "the leader" as opposed to the follower. He gains confidence in himself from this experience which we can see in his confrontation with Nurse Ratched about the cigarettes. In that confrontation he refuses to sit down or to be quiet. Usually in this situation he would follow orders, but since he now has an increased amount of confidence he not only ignores Nurse Ratched's orders to sit down, but McMurphy's as well. At this point he is going completely off of his own feelings, not anyone else's.
Another person who went through change was Chief. Before McMurphy showed up Chief stayed completely to himself without talking or responding to anyone. Although McMurphy knows that he won't talk or listen to him, he treats Chief like an ordinary person anyway. One example is when McMurphy is trying to teach Chief how to play basketball. While doing it one of the orderlies tells him that he's wasting his time. However, later in the film, Chief is playing basketball with the rest of the patients and seems to be enjoying himself for the first time that the audience has seen. He is given a better sense of importance and is starting to realize his strength.