Proactive screening for depression through metaphorical and automatic text analysis

Objective ive and automatic screening for depression is a challenge facing the public health system. This paper describes a system for addressing the above challenge. als and method stem implementing the methodology – Pedesis – harvests the Web for metaphorical relations in which depression is embedded and extracts the relevant conceptual domains describing it. This information is used by human experts for the construction of a “depression lexicon”. The lexicon is used to automatically evaluate the level of depression in texts or whether the text is dealing with depression as a topic. s on three corpora of questions addressed to a mental health site the system provides 9% improvement in prediction whether the question is dealing with depression. Tested on a corpus of Blogs, the system provides 84.2% correct classification rate (p < .001) whether a post includes signs of depression. By comparing the systemʹs prediction to the judgment of human experts we achieved an average 78% precision and 76% recall. sion sion can be automatically screened in texts and the mental health system may benefit from this screening ability.