The process by which any stimulus or representation (external or internal) gets connected to and so triggers a response. Anchors occur naturally and in all representational systems. They can be used intentionally, as in analogue marking or with numerous change techniques, such as Collapse Anchors. The NLP concept of anchoring derives from the Pavlovian stimulus-response reaction, classical conditioning. In Pavlov's study the tuning fork became the stimulus (anchor) that cued the dog to salivate.