The document discusses user psychology and experiences on social media from the perspective of social interaction design. It analyzes how social media platforms can capture and engage user interests by: 1) Socializing user perceptions to produce a believable social world for users. 2) Engaging user affects and motivations by compelling feelings and avoiding anxieties. 3) Providing means for users to relate feelings to actions and engage in social experiences. 4) Satisfying complex user interests through structured social interactions and objects.

4. I. Social media realities

9. Production of social objects

16. User Perceptions

18. User Affects

20. User Engagement

29. II. Capturing Interests

33. Interest: Self-image, Self-perception

35. Interest: Face

37. Interest: Perceptions of Others

39. Interest: Relations

47. Relationships

49. Motives

51. Communication

53. The art of being seen

55. Like-ability

57. Authenticity

59. Belonging

61. Individuality

64. Implications: social media