There are so many factors that can influence a players development. There are 4 common pillars to long term player development, one being, psychological pillar. The 4 pillars are all connected, and are not exclusive of each other. Each one of these pillars will effect the other, and careful consideration must be taken with a players development pathway plan, as no two individuals are the same.
Gavin Carvalho presents the following presentation on, Psychology.