Does your company work with external project managers/project leaders/Project coaches?

As a a freelance project coach, I am sometimes confronted with the fact that a company only wants to work with internal people. I’m trying to understand what is their motivation. To do that I asked these questions on linked in yesterday.
Does your company work with external project managers/project leaders/Project coaches? What are the advantages [...]

5 things I learned during my studying for my psychology exam

As part of my first year of my GTO training, I have to do an exam Psychology next Wednesday.
Next to the things I learned about ratifications on which I posted in blogs about positive and negative ratifications and 5 conditions for effective punishments 
I also learned a few surprising things while reading / studying the book [...]