Summer Milestone 10 Reputation Systems research and exploration Rating Friends Without Making Enemies surabhi and kajal

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Introduction to the paper

Ratings among platform users is a simple task but involves complex subjective dimensions which cannot be overlooked. The paper discusses some of the factors that influence the rating system of an Online Social Networking Site(OSNS): ''

About Couchsurfing
Couchsurfing is an OSNS established in 2003 (before facebook). It lets people build their profiles, connect with people and view their connection's profiles. A user's profiles on Couchsurfing shows the user's friends and how they are rated, and the vouches that others make but not the trust ratings. It is a network of travelers and hosts where hosts are the people who are ready to make a room in their own homes for the travelers to stay. Such a process needs high levels of trust.

Points discussed in the paper

- Challenges faced by the rating system
- Relation and or pattern observed between ‘friendship’ and ‘trust’.
- Reciprocal ratings
- Public versus private rating system and its effect on the reciprocal ratings.
- Quantification of relationships on a predefined scale
- The effect of language and culture on ratings
- Effect of ratings on others reputation
- Timing of ratings relative to the evolution of a relationship

Challenges faced by the rating system
- It was observed that close friendship involves trust factor but high levels of trust need not need good friendship: For example, having 1000 friends on facebook does not mean that the person is trustworthy.
- Concern over the reaction of friends on rating: Only 41.7% of the survey respondents noticed a difference in selecting friendship levels between them and their friends. Off these 201 users, 79 responses expressed neutral sentiments, 26 expressed curiosity as to why the difference, but not enough to ask, some cases also felt guilty or ashamed for assigning a lower rating or level.
- Concern over the effects of rating on a person's profile and reputation: Users generally refrained from giving a negative reference since it would affect the person's profile. A bad remark was avoided unless the experience was extremely bad. Hence, very low negative feedbacks.
- Very little or no incentive for a negative feedback.
- Influence of similarity of user profiles and preferences on trust ratings: It was observed that people with similar profiles and/or people who joined the platform almost at the same time had high trust rates among them.