### Beat the Machine: Challenging Humans to Find a Predictive Model's “Unknown Unknowns”Beat the Machine: Challenging Humans to Find a Predictive Model's “Unknown Unknowns”

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 Author Attenberg, Joshua ♦ Ipeirotis, Panos ♦ Provost, Foster Source ACM Digital Library Content type Text Publisher Association for Computing Machinery (ACM) File Format PDF Copyright Year ©2015 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science Subject Keyword Crowdsourcing ♦ Incentives ♦ Machine learning evaluation ♦ Model assessment ♦ Risk identification ♦ System design Abstract We present techniques for gathering data that expose errors of automatic predictive models. In certain common settings, traditional methods for evaluating predictive models tend to miss rare but important errors—most importantly, cases for which the model is confident of its prediction (but wrong). In this article, we present a system that, in a game-like setting, asks humans to identify cases that will cause the predictive model-based system to fail. Such techniques are valuable in discovering problematic cases that may not reveal themselves during the normal operation of the system and may include cases that are rare but catastrophic. We describe the design of the system, including design iterations that did not quite work. In particular, the system incentivizes humans to provide examples that are difficult for the model to handle by providing a reward proportional to the magnitude of the predictive model's error. The humans are asked to “Beat the Machine” and find cases where the automatic model (“the Machine”) is wrong. Experiments show that the humans using Beat the Machine identify more errors than do traditional techniques for discovering errors in predictive models, and, indeed, they identify many more errors where the machine is (wrongly) confident it is correct. Furthermore, those cases the humans identify seem to be not simply outliers, but coherent areas missed completely by the model. Beat the Machine identifies the “unknown unknowns.” Beat the Machine has been deployed at an industrial scale by several companies. The main impact has been that firms are changing their perspective on and practice of evaluating predictive models. “There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know.” $--\textbf{Donald$ $Rumsfeld}$ ISSN 19361955 Age Range 18 to 22 years ♦ above 22 year Educational Use Research Education Level UG and PG Learning Resource Type Article Publisher Date 2015-03-04 Publisher Place New York e-ISSN 19361963 Journal Journal of Data and Information Quality (JDIQ) Volume Number 6 Issue Number 1 Page Count 17 Starting Page 1 Ending Page 17

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Source: ACM Digital Library