Classical conditioning and cue reactivity
-The pleasurable effects of smoking are known as primary reinforcers. This is because it is intrinsically rewarding because of the effects it has on the brains system. So individual is more likely to smoke again.
-Any other stimuli which occur at the same time are now associated with this pleasurable effect. These stimuli are called secondary reinforcers. e.g. lighters, smell of smoke and cigarette packet.
-These stimuli acts as cues because their presence produces the similar psychological and physiological response as the nicotine.