The use of any sensory stimulus as a means to condition responses. The sensory stimulus may be in the visual, auditory, kinesthetic, olfactory or gustatory sensory system.
For example, traffic lights act as a visual anchor. The smell of your favorite food acts as an olfactory anchor.
A pattern interrupt is an interruption in a specific flow or sequence. The main aim is to prevent any obvious linkage and thereby neurological conditioning. The other purpose is to weaken the old strategy and prevent it from having the same level of intensity as before.
If you knew that looking at the color blue would make your client feel fear, all you need to do is to interrupt the pattern before the fear kicks in. Display the stimulus, then interrupt the pattern. This can make the stimulus lose the original effect.
Deletion is a process by which individuals filter out information and turn to ‘selective attention’ mode. A common example can be illustrated in the diagram below.

It’s common when people are asked to read out the phrase, that they miss out the extra “the” within the triangle. This is used as an example to further discuss ideas about “blind spots” in our perception, where we look for things which may be right under our noses but can’t find them at all. Our mind filters out information.