Kelvin says that he thinks that smoking is wrong. One time, he takes a drag of his roommate's cigarette. Later, Kelvin feels uncomfortable because his behavior violated his attitude, so he decides that he doesn't think smoking is so wrong after all. Kelvin's change of belief can best be explained by theory.

Cognitive dissonance

Explanation:

Cognitive dissonance -  

It refers to scenario which consists of some conflicting attitude , belief or ideas , is referred to as cognitive dissonance .  

The situation can lead to physical as well as mental stress and discomfort in the life of person . The situation can sometimes very get very confusing and the person tends to get very angry and stressed .  

For example , smoking is injurious to health , is an situation of cognitive dissonance .

Hence , from the given scenario of the question ,  

The correct answer is Cognitive dissonance .    

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