Answer:His declining emotional satisfaction is best explained in terms of Adaptation - Level Phenomenon
Step-by-step explanation:
Adaptation-Level Phenomenon is our ability to soon adjust to a new situation up to the point in which the situation becomes the standard. When it becomes a norm we feel a need to experience something else new so as we get use to one thing we desire something else different, new and exciting.
For example when we are not working we wish we could work and earn money then everything will be alright, we find a job that earns us may 500 dollars, we get excited for a while later we start to wish if we could earn more things would be better.
When we start to earn maybe 1500 dollars we would be very excited at first for few months but again we get used to that and it becomes nothing to cover everything we need and we wish for more .
Professor Crane had his paper published and was initially excited however when he heard that someone has had not one but three papers published then his felt insufficient and he probably felt he wished he can also had more papers published.