actions to habits to compulsion Nature Neuroscience, 8(11), 1481-1489; Grigorenko, E. L., De Young, C. G., Eastman, M., Getchell, M., Haeffel, G. J., Klinteberg, B. A., Koposov, R. A., et al. (2010). Aggressive behavior, related conduct problems, and variation in genes affecting dopamine turnover. Aggressive