Пионер в груповата динамика, Бион е асоцииран с Тавистокската група, група на психолози пионери, които основават Тавистокския университет през 1946 на основата на споделени преживявания от военно време. По-късно пише „Изследвания на малката група“, която книга става важно упътване за движенията за групова психотерапия и енкаунтър групите в началото на 60-те и бързо става мерило за работа с приложението на груповата теория в много полета.
Бион е ученик на Мелани Клайн и проявява интерес към психичното развитие на детето, към психозите и към малките групи. Във всяка група съществуват две нива: на рационалното и очевидното и на ирационалното, афективното, скритото и несъзнаваното. Между тези нива съществуват сложни отношения, които се изясняват с помощта на анализа.
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Bion, W.R. (1985). All My Sins Remembered (Another part of a Life) and The Other Side of Genius: Family Letters. (Edited by F.Bion). Abingdon: The Fleetwood Press.
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