Authors: Pauli, W. M., Cockburn, J., Pool, E. R., Perez, O. D., et al. Computational approaches to habits in a model-free world. Current Opinion in Behavioral Sciences, 20, 104-109. https://doi.org/10.1016/j.cobeha.2017.12.001

Authors: Perez, O. D., San Martin, R., & Soto, F. A. Exploring the Effect of Stimulus Similarity on the Summation Effect in Causal Learning. Experimental Psychology, 65, 183-200. doi:10.1027/1618-3169/a000406

Authors: Perez, O. D., Aitken, M. R. F., Milton, A. L., & Dickinson, A. Revisits the patterns of responding under ratio and regulated-probability interval schedules to challenge existing theories.