<P> The Roper, Logan and Tierney model of nursing (originally published in 1980, and subsequently revised in 1985, 1990, 1998 and the latest edition in 2000) is a model of nursing care based upon activities of living (ALs). It is extremely prevalent in the United Kingdom, particularly in the public sector . The model is named after the authors--Nancy Roper, Winifred W. Logan and Alison J. Tierney </P> <P> First developed in 1980, this model is based upon work by Nancy Roper in 1976 . It is the most widely used nursing model in the United Kingdom . The model is based loosely upon the activities of daily living that evolved from the work of Virginia Henderson in 1966 . The latest book edited by these women 2001 is their culminating and completing work, in which they upgrade their model based on their view of societal needs . The original purpose of the model was to be an assessment used throughout the patient's care, but it has become the norm in UK nursing to use it only as a checklist on admission . It is often used to assess how a patient's life has changed due to illness or admission to hospital rather than as a way of planning for increased independence and quality of life . </P>

When was the roper logan tierney model developed