<span> first appearance is your answer</span>
Answer:
Pavlov's theory of stimulus substitution is the combination of several techniques that are called the spectrum of the umbrella in classical conditioning. It occurs with the pairing with the new stimulus to the already conditioned stimulus. When this procedure occurs new stimulus paired with the conditioned stimulus, there are chances of replacing already conditioned stimulus with a new stimulus.
We can take an example of a rat that is to be conditioned to respond to a whistle which related to fed then can add a flashlight as a signal with a whistle. When light is there then rat fed. The light signal is then substituted part of the whistle.
It is referred to as stratification by age or age stratification.It can also be defined as a system of inequalities that have something to do with age.In the west, both the old and the young are seen and treated as incompetent and not included from social life.It is a key source of inequality that may lead to ageism.
