By Paul Tuthill
http://stream.publicbroadcasting.net/production/mp3/wamc/local-wamc-945977.mp3
Amherst, MA – The Martin Luther King Junior holiday is a time when many reflect on relationships between different racial and ethnic groups. A new book , published to coincide with the King holiday, explores intergroup relations. Its co-editor is Linda Tropp, a social psychologist at the University of Massachusetts Amherst. She spoke with WAMC's Pioneer Valley Bureau Chief Paul Tuthill .