This change in alice's response to dental visits is an example of "habituation".
Habituation is an extremely straightforward type of learning, in which a creature, after a time of introduction to an improvement, quits reacting. The most intriguing thing about habituation is that it can happen at various levels in the sensory system. Tactile frameworks may stop, sooner or later, sending signs to the mind because of a constantly present or regularly stimulus. Absence of proceeded with reaction to solid smells is a typical case of tactile home. Habituation to complex stimuli may happen at the level of the mind; the upgrade is as yet seen, yet the creature has essentially "decided" to never again focus.