Reward structure and payoff preferences in human learning

Katz, L. Effects of differential monetary gain and loss on sequential two-choice behavior. J. exp. Psychol., 1964, 67, 245–249.

Keller, L., Cole, M., Burke, C. J., & Estes, W. K. Reward and information values of trial outcomes in paired-associate learning. Psychol. Monogr., 1965, 79, No. 12 (Whole No. 605).

Myers, J. L., & Atkinson, R. C. Choice behavior and reward structure. J. math. Psychol., 1964, 1, 170–203.