The federal Project Grant award R15MH138992, funded by the National Institute of Mental Health (NIMH) under the Mental Health Research Grants program (CFDA 93.242), will support research to identify social computational phenotypes (SCPs) that correspond to distinct transdiagnostic mental health spectra. The $388,026 award to Adelphi University will enable a systematic, data-driven exploration of how mental health conditions map onto social learning and decision-making processes. The research involves conducting large-scale online studies with 1,500 healthy adult participants (ages 18-35) to uncover SCPs related to nonsocial learning, trait learning, and theory-of-mind learning across informational, monetary, and social feedback contexts. The project will also use model-based fMRI with 55 participants to examine the neural correlates of the most robust SCP identified. The findings are expected to provide insights into the relationship between social cognition and mental health, advance understanding of psychopathology, and identify potential targets for treatment.