How many stars are enough to rate an item?

Sometime back, I was faced with this question – Is there a right amount of stars in a star rating system which should be used to rate an item? Different websites use a different number of stars. For instance, imdb uses 10 stars to rate a movie, amazon, tripadvisor, and a million more use 5 […]


Using Wilson’s algorithm to rank ideas

Part I This post if about the advantages and pitfalls and getting Wilson’s algorithm to get to work for ranking content on a content producing website. Spigit is a collaborative innovation platform in which people can a post ideas in response to a challenge and people can vote up/down on the ideas. Sometimes it is […]

Entropy of a crowd network

A crowd can be represented as a complex network of people. The people are represented by nodes which are connected to each other by relationships or edges. These edges have different kind of semantics associated with them. For example, the relationship can be that of “friends” or “follows” etc. Many different kinds of networks can […]