BeerAdvocate Ratings, Explained

Discussion in 'Help Resources' started by Todd, Jun 5, 2014.

  1. Todd

    Todd Founder (13,254) Aug 23, 1996 Finland
    Staff Super Mod Pooh-Bah Society Trader

    The following will help explain the basics behind the ratings and stats for beer, breweries, and other beer-centric places.

    BeerAdvocate (BA) Score
    The BA Score is the beer's overall score based on its ranking within its style category. It's based on the beer's truncated (trimmed) mean and a custom Bayesian (weighted rank) formula that takes the beer's style into consideration. Its purpose is to provide consumers with a quick reference using a format that's familiar to the wine and liquor worlds.

    BA Score Range

    95-100 = world-class
    90-94 = outstanding
    85-89 = very good
    80-84 = good
    70-79 = okay
    60-69 = poor
    < 60 = awful

    All qualifying beers are given an overall ranking and one within their listed beer style. You can learn more about how rankings are applied here:

    pDev (percent deviation)
    Is the percentage of deviation within the ratings. In non-geek terms, it represents a kind of "average deviation from the mean," and helps to validate the review average. The higher the pDev the more overall deviation from the average, which would be a sign of wider spread within the distribution of ratings, while a lower pDev would indicate more of a consensus within the ratings.

    User Ratings (Beers)
    Check out: How to Review a Beer.

    User Ratings (Places)
    Similar to beer ratings, we break places down to 5 ratable attributes.
    • atmosphere (vibe) = 10%
    • quality = 30%
    • service = 25%
    • selection = 25%
    • food = 10%
    If a place doesn't offer food, or the rater doesn't include a food rating, the 10% is spread across the other attributes.

    rDev (rating deviation)
    The individual reviewer's current deviation from the beer's average, represented as either a positive or negative percentage. As the score changes, so does the rDev.

    Quality Assurance
    No system is perfect, however, we take several steps to ensure that our rating standards are fair and as high as we can currently make them.
    • Ten or more ratings are required for a beer to obtain a BA Score and for ranking consideration.
    • Inactive beers (discontinued / retired by the brewery or not rated for a long period of time) are not considered for most stats and lists.
    • Rating and reviewing your own place or beers, or competitors, or paying others to do so, is not allowed and illegal under FTC guidelines. Doing so will result in removal of all content, account banning, and possible further action, without warning.
    • Ratings that are found to be fake or attempt to undermine our system are deleted upon being reported. We take this very seriously. Users may be warned, or banned without warning, and IP addresses may be cross-referenced to identify multiple accounts too.
    Founder's Reviews
    • We periodically receive free samples, which are not guaranteed coverage or favorable mentions.
    • Neither advertisers, sponsorships, or industry relationships influence the opinions expressed by @BeerAdvocate and its founders, @Jason and @Todd. You don't have to believe us, but it's been a fact since 1996.
    We're constantly reviewing our standards and will make adjustments as needed.

    mpruden, Ashes857, Lembeh and 51 others like this.