Model can more naturally detect depression in conversations

Neural network learns speech patterns that predict depression in clinical interviews. How is this even possible? A neural network detected depression in a person?

The researchers hope this method can be used to develop tools to detect signs of depression in natural conversation. In the future, the model could, for instance, power mobile apps that monitor a users text and voice for mental distress and send alerts. This could be especially useful for those who cant get to a clinician for an initial diagnosis, due to distance, cost, or a lack of awareness that something may be wrong.

Obviously, there is a lot going on here from the topic of neural networks to depression, but what can the student to delve deeper into this complicated subject? This is a new field or at least it is a rapidly emerging field and there are less for students to begin working or studying in this field of study. What guides, manuals, textbooks, books, and lectures do you recommend for this topic?