Summary An earlier article described the autonomous execution of activities of daily living (ADLs) in dementia subjects. This is achieved in two phases: 1) by bringing into play the intentional arc, a subject establishes a link with the activity, and 2) the execution of the activity as such. In this second article, we describe a typology of “acts of dispersion” which helps our understanding of the second phase. Assuming a subject to be autonomous and intentionally linked to an activity, we define an act of dispersion as being a withdrawal from that activity. Analysis of different types of dispersion provides a better, differentiated understanding of how dementia subjects carry out ADLs. Our anthropological approach, integrating psychological and behavioural dimensions, sets itself apart from behaviourist and neuropsychological methods by integrating behaviour patterns in their actual order of occurrence and within the overall structure of the activity. By observing subjects’ intentionality, we have defined various types of dispersion, their origins (the moment they occur) and their development. We illustrate this typology with examples from a case of patient care. Our two articles jointly describe a functional model defining how dementia patients execute ADLs. The model provides a theoretical framework for the interpretation and hence anticipation of demented subjects’ functioning patterns so that guidance can be given to a subject while still leaving him a margin of control over his daily environment.