Social Spaces on the Internet:  social ( signals + media )

  Fall 2015

Reputation and Trustworthiness
Assignment 5


1.  Jun Zheng, Nathan Bos, Judith S. Olson, and Gary M. Olson. Trust without Touch:  jump-start trust with social chat.  CHI EA '01.
2.  C. Dellarocas. Online Reputation Systems: How to Design One That Does What You Need. Sloan Management Review 51 (3), Spring 2010, 33-38.
3.  J. Crawford, C. Guo, J. Schroeder, R. Arriaga, and J. Mankoff. Is it a question of trust?: how search preferences influence forum use. Pervasive Health '14.


Write up

1.  Choose an online reputation system (other then Yelp).  Hypothetically, let's say you choose Amazon.  Discuss motivations for leaving feedback.  What is the cost of doing so?  What does one gain by doing so?  Discuss the costs of leaving deceitful feedback.  Is there a punishment mechanism in the system?  What do we know about the rater of the feedback - their reputation?   Please show examples of ratings and comments from items in the reputation system.

2.  Look at the review for a movie on  For example:
The site has reviews from expert critics and the general audience.  How do the reviews and ratings differ?  Are the reviews aimed at the intended audience?

Responses should be submitted via compass in PDF form. 

Late responses will not be accepted.

Academic Integrity
For more information, please review the University Student Conduct Code for Academic Integrity.