Question: Psychohistory is a fictional science in which Isaac Asimov science fiction book series which combines history, sociology and mathematical statistics to make predictions about the future behaviour of very large groups of people and most notably described in his trilogy series which won him the Hugo award and which reference other works by the author including 'Robot' and 'Empire'?
Sentence (from "Foundation series"): The additions made reference to events in Asimov's "Robot" and "Empire" series, indicating that they were also set in the same fictional universe.
Relevant evidence: Yes