Chordates form a phylum of creatures that are based on a bilateral body plan, and is defined by having at some stage in their lives all of the following: 1  A notochord, a fairly stiff rod of cartilage that extends along the inside of the body.t has also proved difficult to produce a detailed classification within the living chordates. Attempts to produce evolutionary  family trees  give results that differ from traditional classes because several of those classes are not monophyletic. As a result, vertebrate classification is in a state of flux.
The major theorists considered to have prepared the ground for Humanistic Psychology are Otto Rank, Abraham Maslow, Carl Rogers and Rollo May. Maslow was heavily influenced by Kurt Goldstein during their years together at Brandeis University.Psychoanalytic writers also influenced humanistic psychology.ne of humanistic psychology's early sources was the work of Carl Rogers, who was strongly influenced by Otto Rank, who broke with Freud in the mid-1920s.
Humanistic psychology is a psychological perspective that rose to prominence in the mid-20th century in response to the limitations of Sigmund Freud's psychoanalytic theory and B. F. Skinner's behaviorism.