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, Jacob Moreno Coined the term "group psychotherapy" founder of psychodrama and organized the
first society for group therapies. Psychodrama, which can be considered a
precursor to group therapy.
Irvin Yalom A leading figure in contemporary group therapy, especially the interpersonal
approach. existentialist
Joseph Pratt Started the first counseling groups in 1905, focusing on patients with tuberculosis.
Kurt Lewin Founder of T-groups (training groups) and pioneer in field theory; referred to group
cohesiveness as "positive valence".
Sam Slavson Founded the American Group Psychotherapy Association (1942) and pioneered
group work with children
Ideal group therapy size? Adult counseling groups generally work best with 5 to 8 members (some sources
say up to 10 or 12, but smaller is preferred for children or intensive work).
What type of groups can be larger (population)? Guidance/psychoeducational
Guidance (Psychoeducational) Preventative, educational, and instruction-based, often originating in schools.
Counseling Focuses on conscious concerns, less severe problems, and rational discussion.
Psychotherapy Treats more severe psychological pathology, often in inpatient or residential
settings.
Forming Stage First group stage; focuses on orientation and exploration.
Storming Stage Second group stage; involves power, control, and transition conflicts.