Pragmatic information,understood as the impact of a message upon a receiving system,represents a matured and comprehensive concept of which earlier proposals are special cases.The di .erent kinds of recipients and reactions to incoming message are characterized.In a historical exposition the principal approaches to the definition and operationalization of information are critically reviewed. From a modern point of view,the measurement of pragmatic information is possible but requires novel and specific procedures.As a perspective notion,pragmatic information will be analyzed in its relationships with (...) other perspective notions,particularly 'meaning' and 'interpretation '.Main fields of application include physics, general systems theory and cognitive science.Together with some reflections on information and meaning, these areas of application point forward to connections with the mind-matter problem. (shrink)

A violation of Bell’s inequalities is generally considered to be the Holy Grail of experimental proof that a specific natural phenomenon cannot be explained in a classical framework and is based on a non-boolean structure of predications. Generalized quantum theory allows for such non-boolean predications. We formulate temporal Bell’s inequalities for cognitive two-state systems and indicate how these inequalities can be tested. This will introduce the notion of temporally non-local measurements. The Necker-Zeno model for bistable perception predicts a violation of (...) these temporal Bell’s inequalities. (shrink)