Credibility Score
Credibility Scores quantify credibility indicators.
Calculation
The Credibility Score algorithm will factor in a variety of weighted indicators. Indicators include relevant on chain actions, such as:
number of vouchers, mutual vouches, and amount vouched
mutual vouch duration and defection
credibility score of vouchers or reviewers
average rating of your contributions on Ethos
account ages of attestation
Weights do not need to be linear. For example, having 100 positive reviews may provide 2x more credibility than 10 positive reviews.
Indicators and weights may be added, removed, or adjusted according to the Credibility Consensus.
Range
The range of the credibility score is currently 0 to 2800, with several different levels (subject to change)
0 - 799
Untrusted
800 - 1199
Questionable
1200 - 1399
Neutral
1400 - 1599
Known
1600 - 1799
Established
1800 - 1999
Reputable
2000 - 2199
Exemplary
2200 - 2399
Distinguished
2400 - 2599
Revered
2600 - 2800
Renowned
All wallets and attestations start at the default 1200 score, "neutral."
Usage
Credibility scores are intended as an "at a glance" quick estimate of credibility across many domains. No single number can represent the complexities of one's reputation among that many groups and interactions. The score is simply a summary of sentiment as measured by social proof.
Different communities' needs may warrant additional weights and calculations. Ethos open protocol allows other dApps to define alternate scores using the same onchain records.
Under the hood
The credibility score will be calculated using a combination of onchain Ethos data and offchain observations like existing social graphs. Eventually, the algorithm will be committed to the Ethos Smart Contract, with all details publicly verifiable.
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