Einstein discovered that time is relative. No one has applied this concept, scientifically to the human condition. All of us know that we perceive differently as we age and in certain circumstances. I have been looking for a mathematical formula to apply to the perception of time for the past 20 years. As of March, 2016 I have not succeeded. But experience tells us certain factors change our experience of time. A one year old experiences a period of 15 minutes differently than a 20 year old. There is reason to think that a 15 minutes to a one year old equals 50% of their perceived time as a sensient being whereas that same 15 minutes represents .001 of their perceived time experience.
But we also know some events are perceived to last longer than others. Has anyone say in a dentist chair and thought the procedure was taking forever? Experiences that cause pain often change the perception of time. Also, some experiences that are associated with a surge of adrenaline seem to slow time such as knowing you are going to be in an automobile accident.
Another unanswered question is whether there are active techniques we can use to extend our perception of an experience. For example, I am experimented with this personally. Once while swinging on a swing along with my daughter Ali when she was 7 years old I knew I didn’t want this to end. So I attempted to imprint the experience as one a great value to be extended as long as possible. Although purely anecdotal it worked! Stay tuned for the mathematical equation. Enjoy.