These matters are often summarized by the five postulates of Humanistic Psychology given by James Bugental (1964), mainly that:
The humanistic approach has its roots in existentialist thought (see Kierkegaard, Nietzsche, Heidegger, and Sartre). It is also sometimes understood within the concept of the three different forces of psychology; behaviorism, psychoanalysis and humanism. Behaviorism grew out of Ivan Pavlov's work with the conditioned reflex, and laid the foundations for academic psychology in the United States associated with the names of John B. Watson and B.F. Skinner. This school was later called the science of behavior. Abraham Maslow later gave behaviorism the name "the second force". The "first force" came out of Freud's research of psychoanalysis, and the psychologies of Alfred Adler, Erik Erikson, Carl Jung, Erich Fromm, Karen Horney, Otto Rank, Melanie Klein, Harry Stack Sullivan, and others. These theorists focused on the depth of the human psyche, which, they stressed, must be combined with those of the conscious mind in order to produce a healthy human personality.
In the late 1950s, psychologists concerned with advancing a more holistic vision of psychology convened two meetings in Detroit, Michigan. These psychologists, including Abraham Maslow, Carl Rogers, and Clark Moustakas, were interested in founding a professional association dedicated to a psychology that focused on uniquely human issues, such as the self, self-actualization, health, hope, love, creativity, nature, being, becoming, individuality, and meaning in short, the understanding of "the personal nature of the human experience".
These preliminary meetings eventually led to other developments, which culminated in the description of humanistic psychology as a recognizable "third force" in psychology (along with behaviorism and psychoanalysis). Significant developments included the formation of the Association for Humanistic Psychology (AHP) in 1961 and the launch of the Journal of Humanistic Psychology (originally "The Phoenix") in 1963. Subsequently, graduate programs in Humanistic Psychology at institutions of higher learning grew in number and enrollment. In 1971, humanistic psychology as a field was recognized by the American Psychological Association (APA) and granted its own division (Division 32) within the APA. Division 32 publishes its own academic journal called The Humanistic Psychologist (Aanstoos, Serlin & Greening, 2000).
The major theorists considered to have prepared the ground for Humanistic Psychology are Abraham Maslow, Carl Rogers and Rollo May. Maslow was heavily influence by Kurt Goldstein during their years together at Brandeis University. The work of Wilhelm Reich, who postulated an essentially 'good', healthy core self, in contrast to Freud, was an early influence, especially his Character Analysis (1933). Other noteworthy inspirers and leaders of the movement include Roberto Assagioli, Gordon Allport, Medard Boss, Martin Buber, R. D. Laing, Fritz Perls, Anthony Sutich, Erich Fromm, Kurt Goldstein, Clark Moustakas, Lewis Mumford and James Bugental (Aanstoos, Serlin & Greening, 2000).
Humanistic psychology prefers qualitative research methods to the more "positivist" and "empiricist" approaches. This is part of the field's "human science" approach to psychology and involves an emphasis on the actual experience of persons (Aanstoos, Serlin & Greening, 2000). Many humanistic psychologists regard the use of quantitative methods in the study of the human mind and behaviour as misguided. This is in direct contrast to cognitivism (which aims to apply the scientific method to the study of psychology), an approach of which humanistic psychology has been strongly critical. Instead, the discipline stresses a phenomenological view of human experience, seeking to understand human beings and their behavior by conducting qualitative research. It has been suggested that the study of Humanistic Psychology be standardized by a protocol: 1. identification of researchable problem, 2. formulation of hypothesis, 3. literature review of research, 4. development of methodology, 5. data collection and analysis, 6. analysis, 7. falsification, 8. results and conclusions, and 9. interpretation. This is the "Lindblom Protocol."
Humanistic psychology includes several approaches to counseling and therapy. Among the earliest approaches we find the developmental theory of Abraham Maslow, emphazising a hierarchy of needs and motivations; the existential psychology of Rollo May acknowledging human choice and the tragic aspects of human existence; and the person-centered or client-centered therapy of Carl Rogers, which is centered on the clients' capacity for self-direction and understanding of his/her own development (Clay, 2002).
Other approaches to humanistic counselling and therapy include Gestalt therapy, humanistic psychotherapy, depth therapy, holistic health, encounter groups, sensitivity training, marital and family therapies, body work, and the existential psychotherapy of Medard Boss (Aanstoos, Serlin & Greening (2000). Existential-integrative psychotherapy, developed by Kirk Schneider (2008), is a relatively new development within humanistic and existential therapy.
Self-help is also included in humanistic psychology. Ernst & Goodison (1981) describe using some of the main humanistic approaches in self-help groups. Co-counselling, which is a purely self-help approach, is regarded as coming within humanistic psychology (see John Rowan's Guide to Humanistic Psychology). Humanistic theory has had a strong influence on other forms of popular therapy, including Harvey Jackins' Re-evaluation Counselling and the work of Carl Rogers.
As mentioned by Clay (2002) Humanistic psychology tends to look beyond the medical model of psychology in order to open up a nonpathologizing view of the person. This usually implies that the therapist downplays the pathological aspects of a person's life in favour of the healthy aspects. A key ingredient in this approach is the meeting between therapist and client and the possibilities for dialogue. The aim of much humanistic therapy is to help the client approach a stronger and more healthy sense of self, also called self-actualization (Aanstoos, Serlin & Greening, 2000; Clay, 2002). All this is part of Humanistic psychology's motivation to be a science of human experience, focusing on the actual lived experience of persons (Aanstoos, Serlin & Greening (2000).
Criticism of the field has come from Isaac Prilleltensky (1992) who argues that humanistic psychology - inadvertently - is affirming the social and political status quo, and therefore has remained fairly silent about social change.
Further, in their review of different approaches to positive psychology, Seligman & Csikszentmihalyi (2000) note that the early incarnations of humanistic psychology lacked a cumulative empirical base, and that some directions encouraged self-centeredness. However, according to mainstream humanistic thinkers, humanistic psychology must not be understood to promote such ideas as narcissism, egotism, or selfishness (Bohart & Greening, 2001).
The association of humanistic discourse with narcissistic and overly optimistic worldviews is a misreading of humanistic theory. In their response to Seligman & Csikszentmihalyi (2000), Bohart & Greening (2001) note that along with pieces on self-actualization and individual fulfillment, humanistic psychologists have also published papers on a wide range of social issues and topics, such as the promotion of international peace and understanding, awareness of the holocaust, the reduction of violence, and the promotion of social welfare and justice for all.
Humanistic Psychology has been criticized because its theories are impossible to falsify (Karl Popper, 1969) and lacks predictive power and therefore is not a science. For instance the psychology of Adler could describe almost any action as a sign that an individual has overcome their feelings of inferiority or alternatively that same behaviour could be described as a failure in this respect. These theories are the scientific equivalent of saying 'either it is raining or it is not'. A good scientific theory should be falsifiable and have predictive power (Chalmers, 1999); therefore humanistic psychology is not a science. Nonetheless, it remains to be determined whether the therapeutic dimension of psychology is exclusively, or even best, served by positivist approaches to psychology. Humanistic Psychology does not reject such methods and research programs as invalid; however, these approaches do not further its own project, which involves cooperatively affirming and balancing the human values whose conflict or imbalance in the identity of a patient can lead to suffering. Humanistic Psychology recognizes that this project puts it outside the realm of falsifiability; it does not aspire to the status of a science in Karl Popper's sense.
On a further note, humanistic psychology presents a fascinating psychological and philosophical outlook on life. While its proponents have not presented it as a science, they recognize that rather than being objective, science is the least subjective understanding of the world of which the largest number of people are aware. Humanistic psychology addresses the nature of the human experience, calling into question the nature of objectivity and the role of objective knowledge in the personal experience of life.