Individuals regularly face choices between safe but unexciting options and tempting yet risky alternatives. Extensive empirical evidence proved those with depression, worry, rumination, etc, are associated with the tendency to engage in risk avoidance in decision-making, and others like alcohol users, smokers, and pathological gamblers show risk-taking. Achieving ideal outcomes is challenging for both groups. However, there have been limited experiments that place these diverse groups of individuals within a unified experimental context. In this project, we aim is (1) to introduce an all-encompassing framework that spans the entire control/inhibition spectrum (ranging from excessive control/inhibition to insufficient control/inhibition), and (2) to investigate whether transcranial direct current brain stimulation (tDCS) can effectively modulate the decision-making behavior of two distinct groups of healthy adults.