Possibility distributions in the linguistic theory of actions

In connection with the formal theory of actions (the so-called linguistic theory of actions) formulated by Maria Nowakowska (1973a) some suggestions concerning its broadening have been made. The theory borders on systems theory and decisions theory giving a structural description of predecisional situations. If fuzzy sets theory is introduced to our discussion a great many interesting applications of the theory of actions may be obtained. Application of concepts proposed by L.A. Zadeh (1978) in his theory of possibility leads to interesting interpretations, illustrated by instances taken from engineering psychology and ergonomics where the formal theory of actions acquires a methodological meaning. It is due to the fact that an action in the form of a sequence and configuration of elementary acts is at the same time a form of a “language” used for description and modelling of (among others) man-machine systems.