Interpreting Neural Networks With Nearest Neighbors [article]

Eric Wallace, Shi Feng, Jordan Boyd-Graber
2018 arXiv   pre-print
Local model interpretation methods explain individual predictions by assigning an importance value to each input feature. This value is often determined by measuring the change in confidence when a feature is removed. However, the confidence of neural networks is not a robust measure of model uncertainty. This issue makes reliably judging the importance of the input features difficult. We address this by changing the test-time behavior of neural networks using Deep k-Nearest Neighbors. Without
more » ... arming text classification accuracy, this algorithm provides a more robust uncertainty metric which we use to generate feature importance values. The resulting interpretations better align with human perception than baseline methods. Finally, we use our interpretation method to analyze model predictions on dataset annotation artifacts.
arXiv:1809.02847v2 fatcat:lp5bqugwhzfk3ixongbt4vmkz4