Human motivation is directly influenced by the probability of a reward
Neuroscience and behavioral studies demonstrate that human and animal motivation is closely modulated by reward probability and expected value.
Multiple retrieved fMRI and neurophysiological papers (e.g., papers 7, 10, 11) investigate how reward probability and magnitude shape subjective valuation, neural connectivity, and behavioral motivation during decision-making tasks. The evidence robustly supports the premise that reward probability directly influences motivational processing. No papers contradict this claim.
Wyngaarden JB 3rd, Nambiar A, Dennison J, Alloy LB, Fareri DS, Jarcho JM, Smith DV. Trait reward sensitivity and behavioral motivation are associated with connectivity between the default mode network and the striatum during reward anticipation.. 2026. https://doi.org/10.3758/s13415-025-01396-9
Demonstrates how behavioral motivation is systematically linked to reward anticipation and reward sensitivity during experimental tasks.
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Grabenhorst F, Schultz W, Ferrari-Toniolo S. Value coding by primate amygdala neurons complies with the continuity axiom of economic choice theory.. 2026. https://doi.org/10.1152/jn.00574.2025
Shows that primate decision-making integrates reward probability and magnitude to form subjective value signals that drive choices.
Orloff MA, Park SA, Blumwald J, Domenech P, Boorman ED. A cognitive map of subjective value space for human risky choice. 2026. https://doi.org/10.64898/2026.05.19.726239
Reveals how the human brain integrates reward probability and amount into a subjective value space to guide risky decision-making.
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