Abraham Maslow is widely recognized as the founder of humanistic psychology.

Humanistic psychology emphasizes the importance of self-actualization, the process of fulfilling one's potential.

Client-centered therapy, developed by Carl Rogers, is a humanistic approach that focuses on the client's subjective experience and self-understanding.

Client-centered therapy aims to create a supportive environment where clients can explore their feelings, gain self-awareness, and work towards personal growth.

In client-centered therapy, the therapist's role is to create a safe and supportive environment, listen actively, and help the client explore their thoughts and feelings.

Viktor Frankl, a prominent existential therapist, emphasized the importance of finding meaning and purpose in life.

Existential therapy focuses on the existential anxiety that arises from the awareness of one's mortality and the meaninglessness of life.

Existential therapy helps clients cope with existential anxiety by providing them with a sense of purpose, helping them to accept the inevitability of death, and encouraging them to live in the present moment.

Rollo May, a prominent existential therapist, emphasized the importance of authenticity, or living in accordance with one's true self.

Existential therapy aims to help clients achieve self-actualization, facilitate their self-exploration and growth, help them find meaning and purpose in life, and promote their authenticity.

Humanistic psychology has influenced psychotherapy by emphasizing the importance of the client-therapist relationship, promoting a more holistic understanding of the individual, and shifting the focus from pathology to growth and potential.

Abraham Maslow developed the concept of the hierarchy of needs, which proposes that individuals must satisfy basic needs before they can pursue higher-level needs such as self-actualization.

Self-actualization needs, which involve the desire to fulfill one's potential and become the best version of oneself, are the highest level in Maslow's hierarchy of needs.

Carl Rogers emphasized the importance of unconditional positive regard, an attitude of acceptance and respect towards clients regardless of their thoughts, feelings, or behaviors.

Unconditional positive regard creates a safe and supportive environment for clients, helps them to feel accepted and valued, and promotes self-exploration and growth.