Collective identity refers to an individual's sense of belonging to a group through shared social activities like consuming media. While media representations present a view of reality, audiences can interpret messages actively and form their own identities. Theories suggest identity is constructed through social interactions rather than inherent, and media provide resources for self-reflection and choosing a lifestyle. Collective identities also form through online fan communities sharing interests in age, gender, culture and politics. Ultimately measuring collective identity is difficult as representations only have meaning through individual interpretation.