Peerindex CEO Azeem Azhar answers some questions about its score

A blog post written by Azeem Azhar (@azeem), Founder of PeerIndex

Last week we asked you what you’d like to know about PeerIndex and if you’d started using the service and needed anything explained.

PeerIndex measures your status and reputation across the social web. The social ranking service that won The Grand Prix award at this year’s Europas offers insights for social media users and brands about topic communities and influencers. Your reputation (or ‘social capital’) is calculated by looking at various factors including how your ideas and opinions spread, how other people interact with you, how interesting other people find your content, and the quality of your engaged network.

Most importantly PeerIndex looks at how authoritative and interesting other people think you are, as well as what topics and categories drive that interest. Our algorithm values people who produce fresh content, which is valued by their friends and contacts online, and is then spread beyond that initial network.

We are mapping out the social web, allowing you to discover new information on people, places and specific topics. We track whose content you are most likely to share, and who is most likely to share your, to analyse your resonance.

We have taken a simple concept of figuring out who was the best source of a particular topic (e.g., who do you listen to to learn about?) and migrated the insights into an algorithm that focuses on understanding how you impact the social web with your conversations. Rather than listening from a single point of view, we watch how you converse with others and the ripples you create. From those ripples, you can see how people respond and react to you – getting a better understanding of your influence.

Another thing to bear in mind is that our influence formula is a rolling analysis run over 120 days, this is a sliding window that goes backwards from the date of calculation. This period of four months is long enough to make sure authority grows and remains consistent, while being short enough to ensure you remain active.

The vital stats section on your page shows your Twitter statistics from the data we have sampled. We won’t access all of your data and have a 3,200 tweet limitation, which’s set by Twitter.


Here are some of the questions that you asked us:

What is the influence formula?How does PeerIndex distinguish itself from other influence measurements?

Specifically we measure authority within topics and aggregate this in-topic authority up to provide a single PeerIndex (the number in they yellow box).

Within a topic (such as Venture Capital or Parenting and Children) we measure your centrality in a graph which has other people active in that topic as nodes and various interactions as edges (with different weights).

Your centrality is given a score. We look at other features extracted from your behaviour, including (but not-limited to) your tweet rate, your mention rate, who RTs you, how many people RT you, and so on. We put your centrality score (together with your other features) into the PeerIndex model and that provides a raw score. This raw score is then transformed in a number from 1 to 100. To work out the overall PeerIndex we aggregate your topic PeerIndex across a range of broad topics.

We strongly take into consideration the nature of the content you share and the quality of people who interact with you – using the simple rules of thumb like ‘birds of a feather flock together’ and that frequent interactions with other high authority individuals is worth more than a large volume of teenage chatter.

Why do topics appear that I don’t really talk about on my profile?

We use semantic analysis and machine algorithms to analyse your messages and the URLs you share. Links and URLs are particularly strong signals – and they often including many different topics.

Our topic hierarchy is very broad – and we endeavour to create topics which reflect real communities. This means you may flag ‘multiple topics’ – for example, if you shared a link about Bribery in Football; it might activate topics around ‘Football’, ‘World Cup’ and ‘Bribery & corruption’.

You need to be quite active in a topic for us to recognise you as being ‘interested in it’.
If we have selected the wrong topics, you can personal your topics through your personal dashboard.

What does the formula value?

We value how other people respond to you, not how you respond to other people. The most important thing is to get a range of people to regularly interact with you (RT you, share your posts, reply).

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  • http://www.blogger.com/profile/01418901854277209418 Tim

    I honestly do not trust PeerIndex’s score. Their score for me is almost the same as my Klout score. However, they list as my Top Topics is completely off. If they can’t get those right, I don’t have faith in the rest.