The effect of affordance on deliberation when retweeting: From the perspective of expression effect

Well-designed social media are supposed to improve user deliberation. Around the 2020 US presidential election, Twitter temporarily suspended the Retweet function and prompted users to use the Quote Tweet function. This study aims to use this natural experiment condition to examine whether this affordance change can increase users' deliberation levels by encouraging them to express themselves. From the expression effect perspective, this change might increase the cognitive costs of users' retweeting and commenting behaviors and thus lead to deliberativeness. Based on this natural experiment, the study found that at the population level, the suspension of the Retweet function made users spend more time before quoting. However, it did not encourage them to post quotation tweets of higher analytical and interactive quality or put more effort into writing longer comments and finding longer tweets to quote. These effects were moderated by users’ retweeting habits, as the change increased deliberativeness for those who used the quotation function frequently before the suspension. © 2023 Elsevier Ltd.