"Regret is a special form of frustration in which the event one would change is an action one has either taken or failed to take ... regret is felt if one can readily imagine having taken an action that would have led to a more desirable outcome. This interpretation explains the close link between the experience of regret and the availability of choice: actions taken under duress generate little regret. The reluctance to violate standard procedures and to act innovatively can also be an effective defense against subsequent regret because it is easy to imagine doing the conventional thing and more difficult to imagine doing the unconventional one" Discuss the above quote, and illustrate how regret and responsibility affect investors' decisions