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- the mobilising mental pressure which arises from the vague feeling of an unfinished task to be completed. Used in education and in advertising (to keep people's interest alive). But according to Perls, the excessive repetition of incomplete 'Gestalts' is a cause of neurosis.

Definition excerpted with permission from Ginger, Serge International Glossary of Gestalt Psychotherapy (Seven languages including English. Order from FORGE at 183 rue Lecourbe; 75015 Paris, France) Paperback 1995.