Labour demanded to know whether anyone posing a threat to national security had entered Britain as a result of the alleged relaxation of identity checks, and accused the Home Office of creating the climate in which it had occurred.

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But she said that there was an element of creating a separate identity as a teacher in the classroom - a "professional persona" with a way of dressing, speaking and modelling forms of behaviour.

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As with the field experiment, some participants were placed in a control group, others engaged in activities that stressed individuality (creating personalized nametags, for example), and some focused on the identity of the organization (such as creating a logo for the research lab).

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