Before revision:  Using  emotional tone of user publications as a proxy for his emotional state, we uncover relationships between state changes and interactions he has in a given community. We observe that authors of negative posts often write more positive comments after engaging in discussions  .
After revision:  Using emotional tone of user publications as a proxy for his emotional state, we uncover relationships between user interactions and state changes. First, we observe that authors of negative posts often write more positive comments after engaging in discussions .