It has been observed that psychopaths will accept positive expected values past some sort of notion of risk aversion by non-psychopaths.
Are there any observations of psychopaths' responses to negative expected values? The quoted study's only valid if it shows that psychopaths respond properly to expected losses.
Shiv, B., Loewenstein, G., Bechara, A., Damasio, H., & Damasio, A. R. (2005). Investment behavior and the negative side of emotion. Psychological Science, 16(6), 435-439.