Answer:
"referred to by their number only”
Explanation:
The Stanford Prison Experiment was a social experiment conducted by Phillip Zimbardo. The aim of the experiment was to show changes in human behaviour upon assigning them a role of either guard or a prisoner, to which they fully conformed.
The article by Saul McLeod provides us with the information on this topic. During the experiment, the phenomenon of deindividuation occurred.
Simply speaking, deindividuation is a phenomenon of losing sense of oneself. All the characteristics which make a person an individual are neglected and people are only looked upon through the prism of the group they belong to.
In this case, guards showed great brutality in treatment of the prisoners; they referred to then only by number, making the prisoners deprived of their name and identity.
