Regret is a negative conscious and emotionalreaction to a person's decision making (which is a choice resulting in action or inaction) have you ever felt regret?
Yes I have definitely felt regret at times in my life. Do you know more about regret?
Regret is related to perceived opportunity, something you may be regretful over is something i may cherish. I like that about regret and emotions in general because it means you can change your outlook on it by changing your persective (sometimes, i dont think it will work for everythng).
It's true a perspective change can really help a situation. Do you know a lot about psychology?
i had a high schools knowledge of psychology but even that has faded away. i loved psychology though especially cognitive psychology! but little fact about regret is in western socities adults have the highest regrets regarding their choice in education, so when making academic decisions choose wisely! 
Wow I had no idea, I can understand though since I regret my own education decisions. Can you tell me more about cognitive psychology?
Cognitive psychology
Cognitive psychology is the scientific study of mental processes such as "attention, language use, memory, perception, problem solving, creativity, and thinking". Much of the work derived from cognitive psychology has been integrated into various other modern disciplines such as Cognitive Science and of psychological study, including educational psychology, social psychology, personality psychology, abnormal psychology, developmental psychology, linguistics, and economics.
History.
Philosophically, ruminations of the human mind and its processes have been around since the times of
Regret
Regret is a negative conscious and emotional reaction to an undesirable situation. 
Regret is related to perceived opportunity. Its intensity varies over time after the decision, in regard to action versus inaction, and in regard to self-control at a particular age. The self-recrimination which comes with regret is thought to spur corrective action and adaptation. 
In Western societies adults have the highest regrets regarding choices of their education. 
Definition.
Regret has been defined by psychologists in the late 1990s as a "