Invasion literature was niche genre with a lack of political impact in Britain.
Ellen S. Berscheid -LRB- born 1936 -RRB- is an American social psychologist .. social psychologist. Social psychology. She is Regents Professor at University of Minnesota , where she received her PhD in 1965 .. University of Minnesota. University of Minnesota. Berscheid specializes in the research of interpersonal relationships .. More specifically , her current research looks at external factors -LRB- environment -RRB- of a relationship and how they influence internal aspects -LRB- satisfaction -RRB- of that relationship .