To Like or Not to Like? An Experimental Study on Relational Closeness, Social Grooming, Reciprocity, and Emotions in Social Media Liking

Abstract We conducted a randomized-controlled experiment with 201 participants to investigate the effects of relationship closeness, emotions, and the receipt of Likes on reciprocal Liking behaviors. We found that individuals engaged in interchange-oriented social grooming by giving Likes to close friends regardless of whether they had received Likes from them before. However, when relationship closeness was low, participants mirrored their acquaintances’ behavior by reciprocating Likes for Likes. Additionally, high-arousal positive emotions mediated the effects of receiving Likes on the intention to Like other users’ content, but this result only held true when relational closeness was not accounted for in the model. Our study explains why people give Likes on social media and what factors shape their Liking intentions. The results of our study contribute to the existing knowledge of the social norm of reciprocity, social grooming, emotion regulation, relational closeness, and social media Liking.