"' Michael, J . Begab "', Head of the Mental Retardation Research Center of The NICHD, ( 1980 ) " Feuerstein has introduced a determinate of cognitive development that is not part of Piagetian theory and more importantly has converted a descriptive system into a instructional and operational one.
12.
Another way of determining the weight associated with a particular health state is to use standard descriptive systems such as the EuroQol Group's EQ-5D questionnaire, which categorises health states according to five dimensions : mobility, self-care, usual activities ( e . g . work, study, homework or leisure activities ), pain / discomfort and anxiety / depression.
13.
Notable among this generation are the photographers Fred Lonidier, whose'Health and Safety Game " of 1976 became a model of post-documentary, and Martha Rosler, whose " The Bowery in Two Inadequate Descriptive Systems " of 1974-75 served as a milestone in the critique of classical humanistic documentary as the work of privileged elites imposing their visions and values on the dis-empowered.
