"This study examines the use of social media by individuals during protests in China (Hong Kong), Iraq, Iran, and Lebanon. Method: Surveys in the four countries assess the relationship between people's attitudes toward the protests and their selection bias on social media, manifested through selective sharing and selective avoidance. Findings: Regardless of the different political and media systems in each country, social media usage was largely similar. Overall, our findings established that people's attitude strength toward the protests was associated with their selective sharing behavior; those who scored high on supporting the protests were more likely than those who scored high on opposing the protests to share news that supports the protests, and vice versa. As for selective avoidance, social media protest news use emerged as the strongest predictor. The more individuals followed and shared protest news on social media, the more likely they were to engage in selective avoidance by hiding or deleting comments, unfriending or unfollowing people, and blocking or reporting people for posting comments with which they disagreed." (Abstract)