When the well known American dog psychologist Grisha Stewart was in Sweden for some seminars of her own, she also met with Anders Hallgren in Stockholm. Now you can see her film with the interview on youtube. Click on the link above to see it.
Hallgren was born in Stockholm, Sweden in 1940. He was examined 1971 as a psychologist, MSc, at the University of Stockholm, Sweden. He is considered to be the the first dog psychologist in the world and has written 31 books on dog training, with a focus on mental activation and empowerment.