Labelling theory refers to an individual who is labelled in a particular way and was studied in great detail by Becker. It arrives originally from sociology but is regularly used in criminological studies. It is said that when someone is given the label of a criminal they may reject or accept it and continue to commit crime. Even those who initially reject the label can eventually accept it as the label becomes more well known, particularly among their peers. This stigma can become even more profound when the labels are about deviancy, and it is thought that this stigmatization can lead to deviancy amplification. Malcolm Klein conducted a test which showed that labelling theory affected some youth offenders but not others.