A generalized reinforcement learning based deep neural network agent model for diverse cognitive constructs

• Published in: Scientific reports Vol. 13; no. 1; pp. 5928 - 12
• Main Authors: Nair, Sandeep Sathyanandan, Muddapu, Vignayanandam Ravindernath, Vigneswaran, C., Balasubramani, Pragathi P., Ramanathan, Dhakshin S., Mishra, Jyoti, Chakravarthy, V. Srinivasa
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 12.04.2023; Nature Publishing Group; Nature Portfolio
• Subjects: 631/114/116; 631/378; Cognition & reasoning; Cognition - physiology; Cognitive ability; Computer applications; Decision making; Humanities and Social Sciences; Humans; Learning; Learning - physiology; Memory; Memory, Short-Term; multidisciplinary; Neural networks; Neural Networks, Computer; Reinforcement; Reinforcement, Psychology; Science; Science (multidisciplinary); Short term memory; System theory; Therapeutic applications
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-023-32234-y

Human cognition is characterized by a wide range of capabilities including goal-oriented selective attention, distractor suppression, decision making, response inhibition, and working memory. Much research has focused on studying these individual components of cognition in isolation, whereas in several translational applications for cognitive impairment, multiple cognitive functions are altered in a given individual. Hence it is important to study multiple cognitive abilities in the same subject or, in computational terms, model them using a single model. To this end, we propose a unified, reinforcement learning-based agent model comprising of systems for representation, memory, value computation and exploration. We successfully modeled the aforementioned cognitive tasks and show how individual performance can be mapped to model meta-parameters. This model has the potential to serve as a proxy for cognitively impaired conditions, and can be used as a clinical testbench on which therapeutic interventions can be simulated first before delivering to human subjects.