Leveraging Human Reasoning to Understand and Improve Visual Question Answering
Visual Question Answering (VQA) is the task of answering questions based on an image. The field has seen significant advances recently, with systems achieving high accuracy even on open-ended questions. However, a number of recent studies have shown that many of these advanced systems exploit biases in datasets, text of the question or similarity of images in the dataset.
To study these reported biases, proposed approaches seek to identify areas of images or words of the questions as evidence that the model focuses on while answering questions. These mechanisms often tend to be limited as the model can answer incorrectly while focusing on the correct region of the image or vice versa.
In this thesis, we seek to incorporate and leverage human reasoning to improve interpretability of these VQA models. Essentially, we train models to generate human-like language as evidence or reasons/rationales for the answers that they predict. Further, we show that this type of system has the potential to improve the accuracy on VQA task itself as well.