EARTH SCIENCES

Deep Neural Networks, part of the broader family of machine learning, have become increasingly influential in everyday real-world applications such as automated face recognition systems and self-driving cars.

Researchers use Deep Neural Networks, or DNNs, to model the processing of information, and to investigate how this information processing matches that of humans.

While DNNs have become an increasingly popular tool to model the computations that the brain does, particularly to recognize real-world “things visually,” the ways in which DNNs do this can be very different.

New research, published in the journal Trends in Cognitive Sciences and led by the University of Glasgow’s School of Psychology and Neuroscience, presents a new approach to understanding whether the human brain and its DNN models recognize things in the same way, using similar steps of computations.

Currently, Deep Neural Network technology is used in applications such as face recognition, and while it is successful in these areas, scientists still do not fully understand how these networks process information.

This opinion article outlines a new approach to better this understanding of how the process works: first, researchers must show that both the brain and the DNNs recognize the same things – such as a face – using the same face features; and, secondly, that the brain and the DNN must process these features in the same way, with the same steps of computations.

As a current challenge of accurate AI development is understanding whether the process of machine learning matches how humans process information, it is hoped this new work is another step forward in the creation of more accurate and reliable AI technology that will process information more as our brains do.

Prof Philippe Schyns, Dean of Research Technology at the University of Glasgow, said: “Having a better understanding of whether the human brain and its DNN models recognize things the same way would allow for more accurate real-world applications using DNNs.

“If we have a greater understanding of the mechanisms of recognition in human brains, we can then transfer that knowledge to DNNs, which in turn will help improve the way DNNs are used in applications such as facial recognition, where there are currently not always accurate.

“Creating human-like AI is about more than mimicking human behavior – technology must also be able to process information, or ‘think’, like or better than humans if it is to be fully relied upon. We want to make sure AI models use the same process to recognize things as a human would, so we don’t just have the illusion that the system is working.”

The study, ‘Degrees of Algorithmic Equivalence between the Brain and its DNN Models’ is published in Trends in Cognitive Sciences. The work is funded by Wellcome and Physical Sciences Research Council.