Crowdsourcing Predictors of Behavioral Outcomes. Abstract Generating models from large data sets—and deter¬mining which subsets of data to mine—is becoming.

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Presentation transcript:

Crowdsourcing Predictors of Behavioral Outcomes

Abstract Generating models from large data sets—and deter¬mining which subsets of data to mine—is becoming increasingly automated. However, choosing what data to collect in the first place requires human intuition or experience, usually supplied by a domain expert. This paper describes a new approach to machine science which demonstrates for the first time that nondomain experts can collectively formulate features and provide values for those features such that they are predictive of some behavioral outcome of interest. This was accomplished by building a Web platform in which human groups interact to both respond to questions likely to help predict a behavioral outcome and pose new questions to their peers. This results in a dynamically growing online survey, but the result of this cooperative behavior also leads to models that can predict the user’s outcomes based on their re¬sponses to the user-generated survey questions.

Abstract con… Here, we describe two Web-based experiments that instantiate this approach: The first site led to models that can predict users’ monthly electric energy consumption, and the other led to models that can predict users’ body mass index. As exponential increases in content are often observed in successful online collaborative communities, the proposed methodology may, in the future, lead to similar exponential rises in discovery and insight into the causal factors of behavioral outcomes.

Existing system THERE ARE many problems in which one seeks to develop predictive models to map between a set of predictor vari¬ables and an outcome. Statistical tools such as multiple regres¬sion or neural networks provide mature methods for computing model parameters when the set of predictive covariates and the model structure are prespecified. Furthermore, recent research is providing new tools for inferring the structural form of nonlinear predictive models, given good input and output data [1]. However, the task of choosing which potentially predictive ariables for which to gather data in the first place is largely a qualitative task that requires substantial domain expertise. For example, a survey designer must have domain expertise to choose questions that may identify predictive covariates. An engineer must develop substantial familiarity with a design in order to determine which variables can be systematically adjusted in order to optimize performance.

Architecture Diagram

System specification HARDWARE REQUIREMENTS Processor : intel Pentium IV Ram : 512 MB Hard Disk : 80 GB HDD SOFTWARE REQUIREMENTS Operating System : windows XP / Windows 7 FrontEnd : Java BackEnd : MySQL 5

CONCLUSION This paper has introduced a new approach to social science modeling in which the participants themselves are motivated to uncover the correlates of some human behavior outcome, such as homeowner electricity usage or BMI. In both cases, participants successfully uncovered at least one statistically significant predictor of the outcome variable. For the BMI outcome, the participants successfully formulated many of the correlates known to predict BMI and provided sufficiently honest values for those correlates to become predictive during the experiment. While, our instantiations focus on energy and BMI, the proposed method is general and might, as the method improves, be useful to answer many difficult questions regard¬ing why some outcomes are different than others. For example, future instantiations might provide new insight into difficult questions like the following: “Why do grade point averages or test scores differ so greatly among students?”, “Why do certain drugs work with some populations but not others?”, and “Why do some people with similar skills and experience, and doing similar work, earn more than others?”

THANK YOU