Now a new study published Friday in Science asks whether hand-washing can wipe the slate clean of any past behavior — even everyday decisions, like, say, choosing Paris over Rome for vacation.

Despite the growing richness of neural science, we have striven to write a coherent introduction to the nervous system for students of behavior, biology, and medicine.

difficulty is that almost all of what is called behavioral science continues to trace behavior to states of mind，feelings，traits of character，human nature，and so on.