What is the difference between stimulus generalization and stimulus discrimination?

A stimulus is an action or procedure used to gain a suitable response.

A stimulus generalisation is when the stimulus can be generalised to a similar stimulus and still gain the same response.

Example, A bell rings at a certain tone and a dog salivates, if the bell rang at a higher or lower tone the dog may still salivate. SO therefore have a generalised stimulus.

A stimulus discrimination is when the participant can discriminate between stimulus ad therefore weaken the effect of the stimulus on the required response.

Example, A dog is given increasingly different sounding bells from the original meaning the stimulus will have a decreased effect and eventually will not the response at all.