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  • 08-1aHave you chosen a bias removal technique appropriate to the model to be developed?
    • There are three bias mitigation techniques for AI models depending on the stage of application: pre-processing, in-processing, and post-processing.

    • Select and implement a technique according to the AI model, objectives, mission, and each technique’s characteristics.

     

    • For services provided by public institutions and to the public, the following are examples of bias removal techniques that you can implement in model development, by data type:
    Removal of sensitive attributes (e.g. gender, ethnicity) in images for face recognition: Expansion of triplet loss can be applied to remove sensitive information from the feature embedding input while maintaining most of the performance [35];
    Gender neutralization when classifying speech-emotion: Multiple types of alterations can be applied to the sound, including frequency shifting, filtering, time stretching and more of wave data [36];
    Removal of bias when toxic language is detected in chatbot texts: Biases do exist in texts and dialects, which can be relabeled to mitigate such biases [37]; and
    Removal of bias when child abuse at home is detected: Variables that are viewed to induce bias, such as social welfare status and gender, are excluded for comparing bias with results before retraining and exclusion [38]