Dr. Guy Gratton gave a lecture recently into research he had done to determine the wide difference in accident rates between the Cessna 150 and 152, which are broadly very similar aircraft.
As I recall, the conclusion of his research was that very light controls of the Cessna 150 allowed pilots to inadvertently stall the aircraft when distracted by navigate /communicate when they should really aviate.
http://bura.brunel.ac.uk/bitstream/2.../Fulltext2.pdf