Browse Definitions :
Definition

overfitting

Overfitting is the incorrect optimizing of an artificial intelligence (AI) model, where the seeking of accuracy goes too far and may result in false positives.

Overfitting contrasts with underfitting, which can also result in inaccuracies. Overfitting is often referred to as overtraining and underfitting as undertraining. Overfitting and underfitting both ruin the accuracy of a model by leading to trend observations and predictions that don’t follow the reality of the data.

False positives from overfitting can cause problems with the predictions and assertions made by AI. Underfitting, on the other hand, can miss data that should be included due to omissions resulting from an over-specific model. In unseen data, an overfit model will make errors reflecting those in its training data. This inaccuracy is often a result of the model beginning to try to memorize results instead of accurately predicting previously unseen data.

For example, an AI hunting is for the number 1 in handwritten data. Depending on the clarity of the handwriting, a false positive might be grouping some 7s as 1s, which would be an overfit. Conversely, an omission that might result could be the failure to recognize 1s in some styles of handwriting, which would be an underfit.

Overfitting can be the result of overtraining, a lack of validation, improper validation or adjustment of weights and attempts at optimization after final testing. Overfitting can also be the result of using training data that is too noisy, containing unsuited information.

This was last updated in April 2018

Continue Reading About overfitting

SearchNetworking
  • network packet

    A network packet is a basic unit of data that's grouped together and transferred over a computer network, typically a ...

  • virtual network functions (VNFs)

    Virtual network functions (VNFs) are virtualized tasks formerly carried out by proprietary, dedicated hardware.

  • network functions virtualization (NFV)

    Network functions virtualization (NFV) is a network architecture model designed to virtualize network services that have ...

SearchSecurity
  • Android System WebView

    Android System WebView is a system component for the Android operating system (OS) that allows Android apps to display web ...

  • data masking

    Data masking is a method of creating a structurally similar but inauthentic version of an organization's data that can be used ...

  • computer worm

    A computer worm is a type of malware whose primary function is to self-replicate and infect other computers while remaining ...

SearchCIO
  • privacy compliance

    Privacy compliance is a company's accordance with established personal information protection guidelines, specifications or ...

  • contingent workforce

    A contingent workforce is a labor pool whose members are hired by an organization on an on-demand basis.

  • product development (new product development -- NPD)

    Product development, also called new product management, is a series of steps that includes the conceptualization, design, ...

SearchHRSoftware
  • talent acquisition

    Talent acquisition is the strategic process employers use to analyze their long-term talent needs in the context of business ...

  • employee retention

    Employee retention is the organizational goal of keeping productive and talented workers and reducing turnover by fostering a ...

  • hybrid work model

    A hybrid work model is a workforce structure that includes employees who work remotely and those who work on site, in a company's...

SearchCustomerExperience
  • Salesforce Trailhead

    Salesforce Trailhead is a series of online tutorials that coach beginner and intermediate developers who need to learn how to ...

  • Salesforce

    Salesforce, Inc. is a cloud computing and social enterprise software-as-a-service (SaaS) provider based in San Francisco.

  • data clean room

    A data clean room is a technology service that helps content platforms keep first person user data private when interacting with ...

Close