He also explained what the many concepts of existential psychology covers.

His philosophy also influenced the development of existential psychology.

Existence helped introduce existential psychology to the US.

May was influenced by American humanism, and interested in reconciling existential psychology with other philosophies, especially Freud's.

He is widely regarded as the founder of Christian psychology and of existential psychology and therapy.

Strenger's account combined individual case-studies with interpretations coming from a variety of disciplines like psychoanalysis, existential psychology, sociology and cultural criticism.

"Existential psychology East-West".

It has always been thought right to know oneself and to act accordingly, and in existential psychology this form of authenticity is seen as central to mental health.

Other major works in this period include critiques of Georg Wilhelm Friedrich Hegel and form a basis for existential psychology.

Cognitive systems psychology is a part of cognitive psychology and like existential psychology, attempts to dissolve the barrier between conscious and the unconscious mind.

In the arena of existential psychology, Binswanger concluded that her bulimia was the expression of an existential vacuum to fill up her needs.

Humanistic psychology and existential psychology also believe that it is more important to understand personal meaning than to find causes and effects of mental processes and behaviors.

Kierkegaard also had a profound influence on psychology and is more or less the founder of Christian psychology and of existential psychology and existential therapy.

He compared psychosynthesis to the prevailing thinking of the day, contrasting psychosynthesis for example with Existential psychology, but unlike the latter considered loneliness not to be "either ultimate or essential."

Using findings of existential psychology, Strenger argues that it becoming progressively more difficult for Homo Globalis to maintain stable self-esteem, because every achievement is compared to the spectacular success stories publicized by the media.

Then there are Gestalt therapy, existential psychology, the humanistic approach, and many others that don't spring directly from Freud but still seek to boost insight into the causes of behavior by exploring repressed thoughts and memories.

His writing on existential psychology centres on what he refers to as the four "givens" of the human condition: isolation, meaninglessness, mortality and freedom, and discusses ways in which the human person can respond to these concerns either in a functional or dysfunctional fashion.

Despite their very different theoretical approaches - hardiness arose from existential psychology and -philosophy, SOC has its roots in sociology, whereas locus of control, self-efficacy, and dispositional optimism all are based on a learning/social cognitive perspective - some striking similarities are present.

Humanistic psychology was developed in the 1950s in reaction to both behaviorism and psychoanalysis, largely due to the person-centered therapy of Carl Rogers (often referred to as Rogerian Therapy) and existential psychology developed by Viktor Frankl and Rollo May.

In 2007, he qualified with a PhD in Business and Management from the International Centre for Corporate Social Responsibility at Nottingham University Business School where he researched what motivates of sustainability managers, using existential psychology as his lens of analysis.