ABSTRACT
Interaction as mutual or reciprocal action or influence has been studied ex tensively in both natural and social sciences. It encompasses a broad array of situations and widely varying subjects: individuals, objects, animals, plants, and organs. Almost all of these can interact between and among themselves. Interaction can take place in very different contexts, and can be conflictual or cooperative. Humans in particular can interact directly or through more or less sophisticated objects. Sometimes humans interact by means of other humans who act as intermediaries. Given the choice, hu mans may not want to interact. On the other hand, they might want to inter act, but not be able to.
