Role of Dopamine in behavior modulation

These findings support the idea that DA signals errors in expectancy and that DA signaling is necessary for certain behavioral responses to unexpected events.
Behavioural Brain Research
Volume 122, Issue 2, 1 October 2001, Pages 193-199
Mitchell F. Roitman^a, Gertjan van Dijk^b, Todd E. Thiele^c and Ilene L. Bernstein^{, ,}