Question

In their studies of homicide offenders, Virkkunen, et al., and Linnoila, et al., found that:
a. The non-impulsive group reported higher levels of dopamine.
b. The impulsive group reported lower levels of dopamine.
c. The impulsive group reported lower levels of serotonin.
d. The non-impulsive group reported lower levels of serotonin.

Answer

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