|Stimulus: is a change in the state of a variable which, by acting on a subject or ultimately a sense cell, can have or cannot have effect or a willingness to do so. Stimuli can occur both outside and inside a living system. While in an event that is without effect, one does not speak of a cause, one speaks very well of stimuli, which remain subliminally and thus trigger no reaction. The reason for this is that several levels are involved in the processing of stimuli and inhibitions may occur during processing.|
Books on Amazon
Stimulus/Kuhn: Kuhn: Human beings do not see stimuli.
Stimulus/Sensation/Kuhn: Experience and knowledge about nature is built into the transition from stimulus to sensation.
The world is not made up of stimuli, but of objects.
Die Struktur wissenschaftlicher Revolutionen Frankfurt 1973