PSY 102 Grand Canyon Week 4 Discussion PSY102 PSY 102 Grand Canyon Week 4 Discussion 1 Is it nature (heredity) or nurture (environment) that determines a person’s character? What factors lead you to believe that? What examples can you cite? PSY 102 Grand Canyon Week 4 Discussion 2 Maslow’s hierarchy of needs is broken up into stages, with a natural progression from one stage to another when the previous need is fulfilled.